121011221212020 has 36 divisors (see below), whose sum is σ = 367067371010340. Its totient is φ = 32269658989824.

The previous prime is 121011221212009. The next prime is 121011221212031. The reversal of 121011221212020 is 20212122110121.

121011221212020 is a `hidden beast` number, since 1 + 210 + 1 + 1 + 221 + 212 + 0 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (121011221212009) and next prime (121011221212031).

It can be written as a sum of positive squares in 2 ways, for example, as 75035579886864 + 45975641325156 = 8662308^2 + 6780534^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121011221211984 and 121011221212002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336142280965 + ... + 336142281324.

Almost surely, 2^{121011221212020} is an apocalyptic number.

121011221212020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121011221212020 is an abundant number, since it is smaller than the sum of its proper divisors (246056149798320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121011221212020 is a wasteful number, since it uses less digits than its factorization.

121011221212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672284562304 (or 672284562299 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121011221212020 its reverse (20212122110121), we get a palindrome (141223343322141).

The spelling of 121011221212020 in words is "one hundred twenty-one trillion, eleven billion, two hundred twenty-one million, two hundred twelve thousand, twenty".