111261122420 has 48 divisors (see below), whose sum is σ = 267146076288. Its totient is φ = 38129616000.

The previous prime is 111261122411. The next prime is 111261122437. The reversal of 111261122420 is 24221162111.

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, 138614 + ... + 491666.

It is an arithmetic number, because the mean of its divisors is an integer number (5565543256).

Almost surely, 2^111261122420 is an apocalyptic number.

111261122420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111261122420 is an abundant number, since it is smaller than the sum of its proper divisors (155884953868).

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

111261122420 is a wasteful number, since it uses less digits than its factorization.

111261122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355320 (or 355318 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 111261122420 its reverse (24221162111), we get a palindrome (135482284531).

The spelling of 111261122420 in words is "one hundred eleven billion, two hundred sixty-one million, one hundred twenty-two thousand, four hundred twenty".