31200000001231 has 4 divisors (see below), whose sum is σ = 31210769765952. Its totient is φ = 31189230236512.

The previous prime is 31200000001229. The next prime is 31200000001241. The reversal of 31200000001231 is 13210000000213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31200000001231 - 2¹ = 31200000001229 is a prime.

It is a super-2 number, since 2×31200000001231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200000001241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5384878015 + ... + 5384883808.

It is an arithmetic number, because the mean of its divisors is an integer number (7802692441488).

Almost surely, 2^{31200000001231} is an apocalyptic number.

31200000001231 is a deficient number, since it is larger than the sum of its proper divisors (10769764721).

31200000001231 is a wasteful number, since it uses less digits than its factorization.

31200000001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10769764720.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31200000001231 its reverse (13210000000213), we get a palindrome (44410000001444).

The spelling of 31200000001231 in words is "thirty-one trillion, two hundred billion, one thousand, two hundred thirty-one".