121021011013 has 4 divisors (see below), whose sum is σ = 138309726880. Its totient is φ = 103732295148.

The previous prime is 121021010993. The next prime is 121021011127. The reversal of 121021011013 is 310110120121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121021011013 - 2¹³ = 121021002821 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121021010984 and 121021011002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021011413) 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, 8644357923 + ... + 8644357936.

It is an arithmetic number, because the mean of its divisors is an integer number (34577431720).

Almost surely, 2^121021011013 is an apocalyptic number.

It is an amenable number.

121021011013 is a deficient number, since it is larger than the sum of its proper divisors (17288715867).

121021011013 is an equidigital number, since it uses as much as digits as its factorization.

121021011013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17288715866.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121021011013 its reverse (310110120121), we get a palindrome (431131131134).

The spelling of 121021011013 in words is "one hundred twenty-one billion, twenty-one million, eleven thousand, thirteen".