31020021213000 has 128 divisors (see below), whose sum is σ = 97341904033920. Its totient is φ = 8224190457600.

The previous prime is 31020021212987. The next prime is 31020021213019. The reversal of 31020021213000 is 31212002013.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29365414 + ... + 30403413.

It is an arithmetic number, because the mean of its divisors is an integer number (760483625265).

Almost surely, 2^{31020021213000} is an apocalyptic number.

31020021213000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31020021213000 is an abundant number, since it is smaller than the sum of its proper divisors (66321882820920).

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

31020021213000 is a wasteful number, since it uses less digits than its factorization.

31020021213000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59769024 (or 59769010 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31020021213000 its reverse (31212002013), we get a palindrome (31051233215013).

The spelling of 31020021213000 in words is "thirty-one trillion, twenty billion, twenty-one million, two hundred thirteen thousand".