31121100002 has 8 divisors (see below), whose sum is σ = 46689380316. Its totient is φ = 15557973232.

The previous prime is 31121100001. The next prime is 31121100029. The reversal of 31121100002 is 20000112113.

It can be written as a sum of positive squares in 2 ways, for example, as 31120840921 + 259081 = 176411^2 + 509^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31121100001) 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, 1273253 + ... + 1297464.

Almost surely, 2^31121100002 is an apocalyptic number.

31121100002 is a deficient number, since it is larger than the sum of its proper divisors (15568280314).

31121100002 is a wasteful number, since it uses less digits than its factorization.

31121100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576772.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31121100002 its reverse (20000112113), we get a palindrome (51121212115).

The spelling of 31121100002 in words is "thirty-one billion, one hundred twenty-one million, one hundred thousand, two".