72220115634011 has 4 divisors (see below), whose sum is σ = 72221489554512. Its totient is φ = 72218741713512.

The previous prime is 72220115633983. The next prime is 72220115634049. The reversal of 72220115634011 is 11043651102227.

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 72220115634011 - 2¹⁸ = 72220115371867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72220115634061) 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, 686881400 + ... + 686986533.

It is an arithmetic number, because the mean of its divisors is an integer number (18055372388628).

Almost surely, 2^{72220115634011} is an apocalyptic number.

72220115634011 is a deficient number, since it is larger than the sum of its proper divisors (1373920501).

72220115634011 is a wasteful number, since it uses less digits than its factorization.

72220115634011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373920500.

The product of its (nonzero) digits is 20160, while the sum is 35.

Adding to 72220115634011 its reverse (11043651102227), we get a palindrome (83263766736238).

The spelling of 72220115634011 in words is "seventy-two trillion, two hundred twenty billion, one hundred fifteen million, six hundred thirty-four thousand, eleven".