121002111122100 has 72 divisors (see below), whose sum is σ = 377030167795680. Its totient is φ = 29785135044480.

The previous prime is 121002111122027. The next prime is 121002111122107. The reversal of 121002111122100 is 1221111200121.

It is a happy number.

It is a super-2 number, since 2×121002111122100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121002111122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002111122107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15513087270 + ... + 15513095069.

Almost surely, 2^{121002111122100} is an apocalyptic number.

121002111122100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121002111122100 is an abundant number, since it is smaller than the sum of its proper divisors (256028056673580).

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

121002111122100 is a wasteful number, since it uses less digits than its factorization.

121002111122100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31026182369 (or 31026182362 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121002111122100 its reverse (1221111200121), we get a palindrome (122223222322221).

The spelling of 121002111122100 in words is "one hundred twenty-one trillion, two billion, one hundred eleven million, one hundred twenty-two thousand, one hundred".