31020012030 has 192 divisors, whose sum is σ = 92177186112. Its totient is φ = 6638284800.

The previous prime is 31020012017. The next prime is 31020012059. The reversal of 31020012030 is 3021002013.

It is a happy number.

It is a super-2 number, since 2×31020012030² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31020011997 and 31020012015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4919880 + ... + 4926180.

It is an arithmetic number, because the mean of its divisors is an integer number (480089511).

Almost surely, 2^31020012030 is an apocalyptic number.

31020012030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31020012030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46088593056).

31020012030 is an abundant number, since it is smaller than the sum of its proper divisors (61157174082).

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

31020012030 is a wasteful number, since it uses less digits than its factorization.

31020012030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539 (or 6532 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31020012030 its reverse (3021002013), we get a palindrome (34041014043).

The spelling of 31020012030 in words is "thirty-one billion, twenty million, twelve thousand, thirty".