1221112130231 has 24 divisors (see below), whose sum is σ = 1453834500624. Its totient is φ = 1022099420160.

The previous prime is 1221112130221. The next prime is 1221112130279. The reversal of 1221112130231 is 1320312111221.

It is not a de Polignac number, because 1221112130231 - 2¹⁸ = 1221111868087 is a prime.

It is a super-2 number, since 2×1221112130231² (a number of 25 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 (1221112130221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9784001 + ... + 9908021.

It is an arithmetic number, because the mean of its divisors is an integer number (60576437526).

Almost surely, 2^{1221112130231} is an apocalyptic number.

1221112130231 is a deficient number, since it is larger than the sum of its proper divisors (232722370393).

1221112130231 is a wasteful number, since it uses less digits than its factorization.

1221112130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128751 (or 128744 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1221112130231 its reverse (1320312111221), we get a palindrome (2541424241452).

The spelling of 1221112130231 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, one hundred thirty thousand, two hundred thirty-one".