1220031002231 has 4 divisors (see below), whose sum is σ = 1291797531792. Its totient is φ = 1148264472672.

The previous prime is 1220031002221. The next prime is 1220031002249. The reversal of 1220031002231 is 1322001300221.

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 1220031002231 - 2³⁴ = 1202851133047 is a prime.

It is a super-2 number, since 2×1220031002231² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 71766529543 = 1220031002231 / (1 + 2 + 2 + 0 + 0 + 3 + 1 + 0 + 0 + 2 + 2 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220031002221) 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, 35883264755 + ... + 35883264788.

It is an arithmetic number, because the mean of its divisors is an integer number (322949382948).

Almost surely, 2^{1220031002231} is an apocalyptic number.

1220031002231 is a deficient number, since it is larger than the sum of its proper divisors (71766529561).

1220031002231 is an equidigital number, since it uses as much as digits as its factorization.

1220031002231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71766529560.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1220031002231 its reverse (1322001300221), we get a palindrome (2542032302452).

The spelling of 1220031002231 in words is "one trillion, two hundred twenty billion, thirty-one million, two thousand, two hundred thirty-one".