31123123020002 has 16 divisors (see below), whose sum is σ = 50289153565560. Its totient is φ = 14360707043712.

The previous prime is 31123123019969. The next prime is 31123123020083. The reversal of 31123123020002 is 20002032132113.

It can be written as a sum of positive squares in 4 ways, for example, as 30894687773401 + 228435246601 = 5558299^2 + 477949^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158703173 + ... + 158899160.

Almost surely, 2^{31123123020002} is an apocalyptic number.

31123123020002 is a deficient number, since it is larger than the sum of its proper divisors (19166030545558).

31123123020002 is a wasteful number, since it uses less digits than its factorization.

31123123020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317606117.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31123123020002 its reverse (20002032132113), we get a palindrome (51125155152115).

The spelling of 31123123020002 in words is "thirty-one trillion, one hundred twenty-three billion, one hundred twenty-three million, twenty thousand, two".