31415201123 has 4 divisors (see below), whose sum is σ = 31444103040. Its totient is φ = 31386299208.

The previous prime is 31415201089. The next prime is 31415201173. The reversal of 31415201123 is 32110251413.

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

It is a cyclic number.

It is not a de Polignac number, because 31415201123 - 2¹² = 31415197027 is a prime.

It is a super-2 number, since 2×31415201123² (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 (31415201173) 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, 14449328 + ... + 14451501.

It is an arithmetic number, because the mean of its divisors is an integer number (7861025760).

Almost surely, 2^31415201123 is an apocalyptic number.

31415201123 is a deficient number, since it is larger than the sum of its proper divisors (28901917).

31415201123 is a wasteful number, since it uses less digits than its factorization.

31415201123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28901916.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 31415201123 its reverse (32110251413), we get a palindrome (63525452536).

The spelling of 31415201123 in words is "thirty-one billion, four hundred fifteen million, two hundred one thousand, one hundred twenty-three".