31101200420 has 24 divisors (see below), whose sum is σ = 65316035904. Its totient is φ = 12439810656.

The previous prime is 31101200359. The next prime is 31101200441. The reversal of 31101200420 is 2400210113.

It is a junction number, because it is equal to n+sod(n) for n = 31101200395 and 31101200404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529019 + ... + 584861.

It is an arithmetic number, because the mean of its divisors is an integer number (2721501496).

Almost surely, 2^31101200420 is an apocalyptic number.

It is an amenable number.

31101200420 is an abundant number, since it is smaller than the sum of its proper divisors (34214835484).

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

31101200420 is a wasteful number, since it uses less digits than its factorization.

31101200420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83699 (or 83697 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 31101200420 its reverse (2400210113), we get a palindrome (33501410533).

The spelling of 31101200420 in words is "thirty-one billion, one hundred one million, two hundred thousand, four hundred twenty".