121010011021 has 16 divisors (see below), whose sum is σ = 127731058560. Its totient is φ = 114414379200.

The previous prime is 121010010977. The next prime is 121010011037. The reversal of 121010011021 is 120110010121.

It is a cyclic number.

It is not a de Polignac number, because 121010011021 - 2⁹ = 121010010509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010010989 and 121010011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010011051) 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, 1381510 + ... + 1466488.

It is an arithmetic number, because the mean of its divisors is an integer number (7983191160).

Almost surely, 2^121010011021 is an apocalyptic number.

It is an amenable number.

121010011021 is a deficient number, since it is larger than the sum of its proper divisors (6721047539).

121010011021 is a wasteful number, since it uses less digits than its factorization.

121010011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85716.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 121010011021 its reverse (120110010121), we get a palindrome (241120021142).

The spelling of 121010011021 in words is "one hundred twenty-one billion, ten million, eleven thousand, twenty-one".