31220011230 has 32 divisors (see below), whose sum is σ = 74937032064. Its totient is φ = 8324335776.

The previous prime is 31220011213. The next prime is 31220011237. The reversal of 31220011230 is 3211002213.

It is a super-2 number, since 2×31220011230² (a number of 22 digits) contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220011237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210837 + ... + 326943.

It is an arithmetic number, because the mean of its divisors is an integer number (2341782252).

Almost surely, 2^31220011230 is an apocalyptic number.

31220011230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31220011230 is an abundant number, since it is smaller than the sum of its proper divisors (43717020834).

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

31220011230 is a wasteful number, since it uses less digits than its factorization.

31220011230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125080.

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

Adding to 31220011230 its reverse (3211002213), we get a palindrome (34431013443).

The spelling of 31220011230 in words is "thirty-one billion, two hundred twenty million, eleven thousand, two hundred thirty".