122021121021 has 4 divisors (see below), whose sum is σ = 162694828032. Its totient is φ = 81347414012.

The previous prime is 122021120957. The next prime is 122021121043. The reversal of 122021121021 is 120121120221.

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 122021121021 - 2⁶ = 122021120957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122021121071) 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, 20336853501 + ... + 20336853506.

It is an arithmetic number, because the mean of its divisors is an integer number (40673707008).

Almost surely, 2^122021121021 is an apocalyptic number.

It is an amenable number.

122021121021 is a deficient number, since it is larger than the sum of its proper divisors (40673707011).

122021121021 is an equidigital number, since it uses as much as digits as its factorization.

122021121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40673707010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122021121021 its reverse (120121120221), we get a palindrome (242142241242).

The spelling of 122021121021 in words is "one hundred twenty-two billion, twenty-one million, one hundred twenty-one thousand, twenty-one".