31020100100 has 72 divisors (see below), whose sum is σ = 73802568000. Its totient is φ = 11223273600.

The previous prime is 31020100099. The next prime is 31020100103. The reversal of 31020100100 is 100102013.

It is a super-2 number, since 2×31020100100² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31020100103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148046 + ... + 289754.

Almost surely, 2^31020100100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020100100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36901284000).

31020100100 is an abundant number, since it is smaller than the sum of its proper divisors (42782467900).

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

31020100100 is a wasteful number, since it uses less digits than its factorization.

31020100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141933 (or 141926 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 31020100100 its reverse (100102013), we get a palindrome (31120202113).

The spelling of 31020100100 in words is "thirty-one billion, twenty million, one hundred thousand, one hundred".