31100021030 has 16 divisors (see below), whose sum is σ = 60286194864. Its totient is φ = 11483084640.

The previous prime is 31100021023. The next prime is 31100021041. The reversal of 31100021030 is 3012000113.

It is a super-2 number, since 2×31100021030² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119615336 + ... + 119615595.

It is an arithmetic number, because the mean of its divisors is an integer number (3767887179).

Almost surely, 2^31100021030 is an apocalyptic number.

31100021030 is a deficient number, since it is larger than the sum of its proper divisors (29186173834).

31100021030 is a wasteful number, since it uses less digits than its factorization.

31100021030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239230951.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 31100021030 its reverse (3012000113), we get a palindrome (34112021143).

The spelling of 31100021030 in words is "thirty-one billion, one hundred million, twenty-one thousand, thirty".