122130031021 has 4 divisors (see below), whose sum is σ = 122232404412. Its totient is φ = 122027657632.

The previous prime is 122130030977. The next prime is 122130031039. The reversal of 122130031021 is 120130031221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120130031221 = 256579 ⋅468199.

It can be written as a sum of positive squares in 2 ways, for example, as 101563316100 + 20566714921 = 318690^2 + 143411^2 .

It is a cyclic number.

It is not a de Polignac number, because 122130031021 - 2⁹ = 122130030509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122130030986 and 122130031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122130031081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51184906 + ... + 51187291.

It is an arithmetic number, because the mean of its divisors is an integer number (30558101103).

Almost surely, 2^122130031021 is an apocalyptic number.

It is an amenable number.

122130031021 is a deficient number, since it is larger than the sum of its proper divisors (102373391).

122130031021 is a wasteful number, since it uses less digits than its factorization.

122130031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102373390.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 122130031021 its reverse (120130031221), we get a palindrome (242260062242).

The spelling of 122130031021 in words is "one hundred twenty-two billion, one hundred thirty million, thirty-one thousand, twenty-one".