1220123020311 has 64 divisors (see below), whose sum is σ = 2049802048000. Its totient is φ = 711079430400.

The previous prime is 1220123020283. The next prime is 1220123020331. The reversal of 1220123020311 is 1130203210221.

1220123020311 is a `hidden beast` number, since 1 + 220 + 1 + 230 + 203 + 11 = 666.

It is not a de Polignac number, because 1220123020311 - 2⁵ = 1220123020279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220123020331) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20103411 + ... + 20164011.

It is an arithmetic number, because the mean of its divisors is an integer number (32028157000).

Almost surely, 2^{1220123020311} is an apocalyptic number.

1220123020311 is a deficient number, since it is larger than the sum of its proper divisors (829679027689).

1220123020311 is a wasteful number, since it uses less digits than its factorization.

1220123020311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63661 (or 63655 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1220123020311 its reverse (1130203210221), we get a palindrome (2350326230532).

The spelling of 1220123020311 in words is "one trillion, two hundred twenty billion, one hundred twenty-three million, twenty thousand, three hundred eleven".