31231320021332 has 24 divisors (see below), whose sum is σ = 57259926178560. Its totient is φ = 14886377858880.

The previous prime is 31231320021323. The next prime is 31231320021401. The reversal of 31231320021332 is 23312002313213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1879584857 + ... + 1879601472.

It is an arithmetic number, because the mean of its divisors is an integer number (2385830257440).

Almost surely, 2^{31231320021332} is an apocalyptic number.

It is an amenable number.

31231320021332 is a deficient number, since it is larger than the sum of its proper divisors (26028606157228).

31231320021332 is a wasteful number, since it uses less digits than its factorization.

31231320021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759186431 (or 3759186429 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31231320021332 its reverse (23312002313213), we get a palindrome (54543322334545).

The spelling of 31231320021332 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, twenty-one thousand, three hundred thirty-two".