61115111022 has 32 divisors (see below), whose sum is σ = 139700772864. Its totient is φ = 17460324000.

The previous prime is 61115110963. The next prime is 61115111051. The reversal of 61115111022 is 22011151116.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61115111022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772947 + ... + 848337.

It is an arithmetic number, because the mean of its divisors is an integer number (4365649152).

Almost surely, 2^61115111022 is an apocalyptic number.

61115111022 is an abundant number, since it is smaller than the sum of its proper divisors (78585661842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61115111022 is a wasteful number, since it uses less digits than its factorization.

61115111022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94704.

The product of its (nonzero) digits is 120, while the sum is 21.

Adding to 61115111022 its reverse (22011151116), we get a palindrome (83126262138).

The spelling of 61115111022 in words is "sixty-one billion, one hundred fifteen million, one hundred eleven thousand, twenty-two".