31101421320 has 96 divisors (see below), whose sum is σ = 101237572800. Its totient is φ = 8280752256.

The previous prime is 31101421313. The next prime is 31101421333. The reversal of 31101421320 is 2312410113.

31101421320 is a `hidden beast` number, since 311 + 0 + 14 + 21 + 320 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 31101421293 and 31101421302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164301 + ... + 298659.

It is an arithmetic number, because the mean of its divisors is an integer number (1054558050).

Almost surely, 2^31101421320 is an apocalyptic number.

31101421320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31101421320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50618786400).

31101421320 is an abundant number, since it is smaller than the sum of its proper divisors (70136151480).

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

31101421320 is a wasteful number, since it uses less digits than its factorization.

31101421320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135019 (or 135012 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 31101421320 its reverse (2312410113), we get a palindrome (33413831433).

The spelling of 31101421320 in words is "thirty-one billion, one hundred one million, four hundred twenty-one thousand, three hundred twenty".