31004121402 has 24 divisors (see below), whose sum is σ = 67404876084. Its totient is φ = 10299433344.

The previous prime is 31004121389. The next prime is 31004121431. The reversal of 31004121402 is 20412140013.

It can be written as a sum of positive squares in 2 ways, for example, as 20184169041 + 10819952361 = 142071^2 + 104019^2 .

It is a super-2 number, since 2×31004121402² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2934063 + ... + 2944610.

Almost surely, 2^31004121402 is an apocalyptic number.

31004121402 is an abundant number, since it is smaller than the sum of its proper divisors (36400754682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31004121402 is a wasteful number, since it uses less digits than its factorization.

31004121402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5878974 (or 5878971 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 31004121402 its reverse (20412140013), we get a palindrome (51416261415).

The spelling of 31004121402 in words is "thirty-one billion, four million, one hundred twenty-one thousand, four hundred two".