111147453921 has 32 divisors (see below), whose sum is σ = 170135866368. Its totient is φ = 63225167040.

The previous prime is 111147453899. The next prime is 111147453929. The reversal of 111147453921 is 129354741111.

It is not a de Polignac number, because 111147453921 - 2⁹ = 111147453409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111147453921.

It is not an unprimeable number, because it can be changed into a prime (111147453929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6296710 + ... + 6314336.

It is an arithmetic number, because the mean of its divisors is an integer number (5316745824).

Almost surely, 2^111147453921 is an apocalyptic number.

It is an amenable number.

111147453921 is a deficient number, since it is larger than the sum of its proper divisors (58988412447).

111147453921 is a wasteful number, since it uses less digits than its factorization.

111147453921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18981.

The product of its digits is 30240, while the sum is 39.

The spelling of 111147453921 in words is "one hundred eleven billion, one hundred forty-seven million, four hundred fifty-three thousand, nine hundred twenty-one".