64022131021521 has 16 divisors (see below), whose sum is σ = 85403672827200. Its totient is φ = 42661006371648.

The previous prime is 64022131021501. The next prime is 64022131021547. The reversal of 64022131021521 is 12512013122046.

It is not a de Polignac number, because 64022131021521 - 2⁷ = 64022131021393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64022131021501) 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, 197097775 + ... + 197422331.

It is an arithmetic number, because the mean of its divisors is an integer number (5337729551700).

Almost surely, 2^{64022131021521} is an apocalyptic number.

It is an amenable number.

64022131021521 is a deficient number, since it is larger than the sum of its proper divisors (21381541805679).

64022131021521 is a wasteful number, since it uses less digits than its factorization.

64022131021521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355808.

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 64022131021521 its reverse (12512013122046), we get a palindrome (76534144143567).

The spelling of 64022131021521 in words is "sixty-four trillion, twenty-two billion, one hundred thirty-one million, twenty-one thousand, five hundred twenty-one".