1220431140231 has 4 divisors (see below), whose sum is σ = 1627241520312. Its totient is φ = 813620760152.

The previous prime is 1220431140223. The next prime is 1220431140239. The reversal of 1220431140231 is 1320411340221.

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

It is an interprime number because it is at equal distance from previous prime (1220431140223) and next prime (1220431140239).

It is a cyclic number.

It is not a de Polignac number, because 1220431140231 - 2³ = 1220431140223 is a prime.

It is a super-2 number, since 2×1220431140231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220431140239) 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, 203405190036 + ... + 203405190041.

It is an arithmetic number, because the mean of its divisors is an integer number (406810380078).

Almost surely, 2^{1220431140231} is an apocalyptic number.

1220431140231 is a deficient number, since it is larger than the sum of its proper divisors (406810380081).

1220431140231 is an equidigital number, since it uses as much as digits as its factorization.

1220431140231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406810380080.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1220431140231 its reverse (1320411340221), we get a palindrome (2540842480452).

The spelling of 1220431140231 in words is "one trillion, two hundred twenty billion, four hundred thirty-one million, one hundred forty thousand, two hundred thirty-one".