121002112122021 has 64 divisors (see below), whose sum is σ = 195957285072640. Its totient is φ = 73342425784320.

The previous prime is 121002112122011. The next prime is 121002112122041. The reversal of 121002112122021 is 120221211200121.

121002112122021 is a `hidden beast` number, since 1 + 210 + 0 + 211 + 2 + 1 + 220 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-121002112122021 is a prime.

It is a super-2 number, since 2×121002112122021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121002112121985 and 121002112122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002112122011) 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 63 ways as a sum of consecutive naturals, for example, 193302981 + ... + 193927941.

It is an arithmetic number, because the mean of its divisors is an integer number (3061832579260).

Almost surely, 2^{121002112122021} is an apocalyptic number.

It is an amenable number.

121002112122021 is a deficient number, since it is larger than the sum of its proper divisors (74955172950619).

121002112122021 is a wasteful number, since it uses less digits than its factorization.

121002112122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633283 (or 633277 counting only the distinct ones).

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

Adding to 121002112122021 its reverse (120221211200121), we get a palindrome (241223323322142).

The spelling of 121002112122021 in words is "one hundred twenty-one trillion, two billion, one hundred twelve million, one hundred twenty-two thousand, twenty-one".