156720231122 has 32 divisors (see below), whose sum is σ = 289364793984. Its totient is φ = 61991683200.

The previous prime is 156720231121. The next prime is 156720231127. The reversal of 156720231122 is 221132027651.

It is a super-2 number, since 2×156720231122² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156720231121) 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, 1592222 + ... + 1687782.

It is an arithmetic number, because the mean of its divisors is an integer number (9042649812).

Almost surely, 2^156720231122 is an apocalyptic number.

156720231122 is a deficient number, since it is larger than the sum of its proper divisors (132644562862).

156720231122 is a wasteful number, since it uses less digits than its factorization.

156720231122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104594.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 156720231122 its reverse (221132027651), we get a palindrome (377852258773).

The spelling of 156720231122 in words is "one hundred fifty-six billion, seven hundred twenty million, two hundred thirty-one thousand, one hundred twenty-two".