221312130101231 has 16 divisors (see below), whose sum is σ = 238368168444000. Its totient is φ = 204260669319168.

The previous prime is 221312130101207. The next prime is 221312130101287. The reversal of 221312130101231 is 132101031213122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221312130101231 - 2¹⁰ = 221312130100207 is a prime.

It is a super-2 number, since 2×221312130101231² (a number of 29 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 = 221312130101197 and 221312130101206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221318130101231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5248197515 + ... + 5248239683.

It is an arithmetic number, because the mean of its divisors is an integer number (14898010527750).

Almost surely, 2^{221312130101231} is an apocalyptic number.

221312130101231 is a deficient number, since it is larger than the sum of its proper divisors (17056038342769).

221312130101231 is a wasteful number, since it uses less digits than its factorization.

221312130101231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86858.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 221312130101231 its reverse (132101031213122), we get a palindrome (353413161314353).

The spelling of 221312130101231 in words is "two hundred twenty-one trillion, three hundred twelve billion, one hundred thirty million, one hundred one thousand, two hundred thirty-one".