31001023133123 has 8 divisors (see below), whose sum is σ = 31027326644160. Its totient is φ = 30974722291240.

The previous prime is 31001023133117. The next prime is 31001023133131. The reversal of 31001023133123 is 32133132010013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31001023133123 - 2²² = 31001018938819 is a prime.

It is a super-2 number, since 2×31001023133123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31001023133183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22925036 + ... + 24239622.

It is an arithmetic number, because the mean of its divisors is an integer number (3878415830520).

Almost surely, 2^{31001023133123} is an apocalyptic number.

31001023133123 is a deficient number, since it is larger than the sum of its proper divisors (26303511037).

31001023133123 is a wasteful number, since it uses less digits than its factorization.

31001023133123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334577.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 31001023133123 its reverse (32133132010013), we get a palindrome (63134155143136).

The spelling of 31001023133123 in words is "thirty-one trillion, one billion, twenty-three million, one hundred thirty-three thousand, one hundred twenty-three".