122313220025521 has 4 divisors (see below), whose sum is σ = 139786537172032. Its totient is φ = 104839902879012.

The previous prime is 122313220025473. The next prime is 122313220025543. The reversal of 122313220025521 is 125520022313221.

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 not a de Polignac number, because 122313220025521 - 2³⁵ = 122278860287153 is a prime.

It is a super-2 number, since 2×122313220025521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122313220020521) 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, 8736658573245 + ... + 8736658573258.

It is an arithmetic number, because the mean of its divisors is an integer number (34946634293008).

Almost surely, 2^{122313220025521} is an apocalyptic number.

It is an amenable number.

122313220025521 is a deficient number, since it is larger than the sum of its proper divisors (17473317146511).

122313220025521 is an equidigital number, since it uses as much as digits as its factorization.

122313220025521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17473317146510.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 122313220025521 its reverse (125520022313221), we get a palindrome (247833242338742).

The spelling of 122313220025521 in words is "one hundred twenty-two trillion, three hundred thirteen billion, two hundred twenty million, twenty-five thousand, five hundred twenty-one".