120021564431 has 2 divisors, whose sum is σ = 120021564432. Its totient is φ = 120021564430.

The previous prime is 120021564409. The next prime is 120021564449. The reversal of 120021564431 is 134465120021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120021564431 - 2¹⁴ = 120021548047 is a prime.

It is a super-2 number, since 2×120021564431² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120021564394 and 120021564403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120021564451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010782215 + 60010782216.

It is an arithmetic number, because the mean of its divisors is an integer number (60010782216).

Almost surely, 2^120021564431 is an apocalyptic number.

120021564431 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021564431 is an equidigital number, since it uses as much as digits as its factorization.

120021564431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 120021564431 its reverse (134465120021), we get a palindrome (254486684452).

The spelling of 120021564431 in words is "one hundred twenty billion, twenty-one million, five hundred sixty-four thousand, four hundred thirty-one".