31220031231010 has 8 divisors (see below), whose sum is σ = 56196056215836. Its totient is φ = 12488012492400.

The previous prime is 31220031230981. The next prime is 31220031231031. The reversal of 31220031231010 is 1013213002213.

It can be written as a sum of positive squares in 2 ways, for example, as 27035351399809 + 4184679831201 = 5199553^2 + 2045649^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561001561541 + ... + 1561001561560.

Almost surely, 2^{31220031231010} is an apocalyptic number.

31220031231010 is a deficient number, since it is larger than the sum of its proper divisors (24976024984826).

31220031231010 is a wasteful number, since it uses less digits than its factorization.

31220031231010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122003123108.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31220031231010 its reverse (1013213002213), we get a palindrome (32233244233223).

The spelling of 31220031231010 in words is "thirty-one trillion, two hundred twenty billion, thirty-one million, two hundred thirty-one thousand, ten".