111653561121 has 8 divisors (see below), whose sum is σ = 148926299040. Its totient is φ = 74408265312.

The previous prime is 111653561099. The next prime is 111653561183. The reversal of 111653561121 is 121165356111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111653561121 - 2¹³ = 111653552929 is a prime.

It is a super-2 number, since 2×111653561121² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111653561021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6851031 + ... + 6867308.

It is an arithmetic number, because the mean of its divisors is an integer number (18615787380).

Almost surely, 2^111653561121 is an apocalyptic number.

It is an amenable number.

111653561121 is a deficient number, since it is larger than the sum of its proper divisors (37272737919).

111653561121 is a wasteful number, since it uses less digits than its factorization.

111653561121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13721055.

The product of its digits is 5400, while the sum is 33.

The spelling of 111653561121 in words is "one hundred eleven billion, six hundred fifty-three million, five hundred sixty-one thousand, one hundred twenty-one".