31012112401 has 4 divisors (see below), whose sum is σ = 31017512500. Its totient is φ = 31006712304.

The previous prime is 31012112381. The next prime is 31012112407. The reversal of 31012112401 is 10421121013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 289034001 + 30723078400 = 17001^2 + 175280^2 .

It is a cyclic number.

It is not a de Polignac number, because 31012112401 - 2²¹ = 31010015249 is a prime.

It is a super-2 number, since 2×31012112401² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012112407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691426 + ... + 2702923.

It is an arithmetic number, because the mean of its divisors is an integer number (7754378125).

Almost surely, 2^31012112401 is an apocalyptic number.

It is an amenable number.

31012112401 is a deficient number, since it is larger than the sum of its proper divisors (5400099).

31012112401 is an equidigital number, since it uses as much as digits as its factorization.

31012112401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400098.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 31012112401 its reverse (10421121013), we get a palindrome (41433233414).

The spelling of 31012112401 in words is "thirty-one billion, twelve million, one hundred twelve thousand, four hundred one".