10120400031 has 16 divisors (see below), whose sum is σ = 15435257600. Its totient is φ = 5777949888.

The previous prime is 10120400029. The next prime is 10120400047. The reversal of 10120400031 is 13000402101.

It is a happy number.

It is not a de Polignac number, because 10120400031 - 2¹ = 10120400029 is a prime.

It is a super-2 number, since 2×10120400031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120400051) 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, 189721 + ... + 237138.

It is an arithmetic number, because the mean of its divisors is an integer number (964703600).

Almost surely, 2^10120400031 is an apocalyptic number.

10120400031 is a deficient number, since it is larger than the sum of its proper divisors (5314857569).

10120400031 is a wasteful number, since it uses less digits than its factorization.

10120400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427998.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 10120400031 its reverse (13000402101), we get a palindrome (23120802132).

The spelling of 10120400031 in words is "ten billion, one hundred twenty million, four hundred thousand, thirty-one".