31121300001 has 16 divisors (see below), whose sum is σ = 45375402240. Its totient is φ = 18816370320.

The previous prime is 31121299991. The next prime is 31121300011. The reversal of 31121300001 is 10000312113.

It is an interprime number because it is at equal distance from previous prime (31121299991) and next prime (31121300011).

It is not a de Polignac number, because 31121300001 - 2¹⁴ = 31121283617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31121300001.

It is not an unprimeable number, because it can be changed into a prime (31121300011) 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, 1111555 + ... + 1139208.

It is an arithmetic number, because the mean of its divisors is an integer number (2835962640).

Almost surely, 2^31121300001 is an apocalyptic number.

It is an amenable number.

31121300001 is a deficient number, since it is larger than the sum of its proper divisors (14254102239).

31121300001 is a wasteful number, since it uses less digits than its factorization.

31121300001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251196.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 31121300001 its reverse (10000312113), we get a palindrome (41121612114).

It can be divided in two parts, 311 and 21300001, that added together give a palindrome (21300312).

The spelling of 31121300001 in words is "thirty-one billion, one hundred twenty-one million, three hundred thousand, one".