121012013021 has 16 divisors (see below), whose sum is σ = 122469950976. Its totient is φ = 119564617536.

The previous prime is 121012013011. The next prime is 121012013069. The reversal of 121012013021 is 120310210121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121012013021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012012987 and 121012013005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012013011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23785940 + ... + 23791026.

It is an arithmetic number, because the mean of its divisors is an integer number (7654371936).

Almost surely, 2^121012013021 is an apocalyptic number.

It is an amenable number.

121012013021 is a deficient number, since it is larger than the sum of its proper divisors (1457937955).

121012013021 is a wasteful number, since it uses less digits than its factorization.

121012013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6068.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121012013021 its reverse (120310210121), we get a palindrome (241322223142).

The spelling of 121012013021 in words is "one hundred twenty-one billion, twelve million, thirteen thousand, twenty-one".