2113220231231 has 4 divisors (see below), whose sum is σ = 2113343403600. Its totient is φ = 2113097058864.

The previous prime is 2113220231197. The next prime is 2113220231237. The reversal of 2113220231231 is 1321320223112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113220231231 is a prime.

It is a super-2 number, since 2×2113220231231² (a number of 25 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 = 2113220231197 and 2113220231206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113220231237) 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, 61560446 + ... + 61594763.

It is an arithmetic number, because the mean of its divisors is an integer number (528335850900).

Almost surely, 2^{2113220231231} is an apocalyptic number.

2113220231231 is a deficient number, since it is larger than the sum of its proper divisors (123172369).

2113220231231 is a wasteful number, since it uses less digits than its factorization.

2113220231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123172368.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2113220231231 its reverse (1321320223112), we get a palindrome (3434540454343).

The spelling of 2113220231231 in words is "two trillion, one hundred thirteen billion, two hundred twenty million, two hundred thirty-one thousand, two hundred thirty-one".