121010220020 has 24 divisors (see below), whose sum is σ = 254147544168. Its totient is φ = 48399120000.

The previous prime is 121010220017. The next prime is 121010220043. The reversal of 121010220020 is 20022010121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32228866576 + 88781353444 = 179524^2 + 297962^2 .

It is a super-3 number, since 3×121010220020³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121010219983 and 121010220010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107531 + ... + 503570.

It is an arithmetic number, because the mean of its divisors is an integer number (10589481007).

Almost surely, 2^121010220020 is an apocalyptic number.

121010220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121010220020 is an abundant number, since it is smaller than the sum of its proper divisors (133137324148).

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

121010220020 is a wasteful number, since it uses less digits than its factorization.

121010220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621011 (or 621009 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 121010220020 its reverse (20022010121), we get a palindrome (141032230141).

The spelling of 121010220020 in words is "one hundred twenty-one billion, ten million, two hundred twenty thousand, twenty".