31220201011231 has 8 divisors (see below), whose sum is σ = 31394766153600. Its totient is φ = 31045637542680.

The previous prime is 31220201011229. The next prime is 31220201011243. The reversal of 31220201011231 is 13211010202213.

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

It is a cyclic number.

It is not a de Polignac number, because 31220201011231 - 2¹ = 31220201011229 is a prime.

It is a super-2 number, since 2×31220201011231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31220201011199 and 31220201011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220201011031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70227630 + ... + 70670788.

It is an arithmetic number, because the mean of its divisors is an integer number (3924345769200).

Almost surely, 2^{31220201011231} is an apocalyptic number.

31220201011231 is a deficient number, since it is larger than the sum of its proper divisors (174565142369).

31220201011231 is a wasteful number, since it uses less digits than its factorization.

31220201011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836909.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 31220201011231 its reverse (13211010202213), we get a palindrome (44431211213444).

The spelling of 31220201011231 in words is "thirty-one trillion, two hundred twenty billion, two hundred one million, eleven thousand, two hundred thirty-one".