121111201002020 has 12 divisors (see below), whose sum is σ = 254333522104284. Its totient is φ = 48444480400800.

The previous prime is 121111201001981. The next prime is 121111201002023. The reversal of 121111201002020 is 20200102111121.

It can be written as a sum of positive squares in 2 ways, for example, as 18021943791076 + 103089257210944 = 4245226^2 + 10153288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121111201001986 and 121111201002004.

It is not an unprimeable number, because it can be changed into a prime (121111201002023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3027780025031 + ... + 3027780025070.

It is an arithmetic number, because the mean of its divisors is an integer number (21194460175357).

Almost surely, 2^{121111201002020} is an apocalyptic number.

121111201002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111201002020 is an abundant number, since it is smaller than the sum of its proper divisors (133222321102264).

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

121111201002020 is a wasteful number, since it uses less digits than its factorization.

121111201002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055560050110 (or 6055560050108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121111201002020 its reverse (20200102111121), we get a palindrome (141311303113141).

The spelling of 121111201002020 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred one million, two thousand, twenty".