220031143311 has 16 divisors (see below), whose sum is σ = 335292991488. Its totient is φ = 125729292000.

The previous prime is 220031143307. The next prime is 220031143313. The reversal of 220031143311 is 113341130022.

It is not a de Polignac number, because 220031143311 - 2² = 220031143307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220031143313) 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, 1198501 + ... + 1369841.

It is an arithmetic number, because the mean of its divisors is an integer number (20955811968).

Almost surely, 2^220031143311 is an apocalyptic number.

220031143311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

220031143311 is a deficient number, since it is larger than the sum of its proper divisors (115261848177).

220031143311 is a wasteful number, since it uses less digits than its factorization.

220031143311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232502.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 220031143311 its reverse (113341130022), we get a palindrome (333372273333).

The spelling of 220031143311 in words is "two hundred twenty billion, thirty-one million, one hundred forty-three thousand, three hundred eleven".