31420212124 has 48 divisors (see below), whose sum is σ = 66628433088. Its totient is φ = 12656268288.

The previous prime is 31420212059. The next prime is 31420212127. The reversal of 31420212124 is 42121202413.

It is a junction number, because it is equal to n+sod(n) for n = 31420212095 and 31420212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31420212127) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 303882 + ... + 393934.

It is an arithmetic number, because the mean of its divisors is an integer number (1388092356).

Almost surely, 2^31420212124 is an apocalyptic number.

31420212124 is a gapful number since it is divisible by the number (34) 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 31420212124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33314216544).

31420212124 is an abundant number, since it is smaller than the sum of its proper divisors (35208220964).

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

31420212124 is a wasteful number, since it uses less digits than its factorization.

31420212124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90814 (or 90812 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 31420212124 its reverse (42121202413), we get a palindrome (73541414537).

The spelling of 31420212124 in words is "thirty-one billion, four hundred twenty million, two hundred twelve thousand, one hundred twenty-four".