111203431621 has 8 divisors (see below), whose sum is σ = 112281382400. Its totient is φ = 110126530800.

The previous prime is 111203431597. The next prime is 111203431657. The reversal of 111203431621 is 126134302111.

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

It is a cyclic number.

It is not a de Polignac number, because 111203431621 - 2⁵ = 111203431589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111203437621) 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, 48801 + ... + 474118.

It is an arithmetic number, because the mean of its divisors is an integer number (14035172800).

Almost surely, 2^111203431621 is an apocalyptic number.

It is an amenable number.

111203431621 is a deficient number, since it is larger than the sum of its proper divisors (1077950779).

111203431621 is a wasteful number, since it uses less digits than its factorization.

111203431621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524979.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 111203431621 its reverse (126134302111), we get a palindrome (237337733732).

The spelling of 111203431621 in words is "one hundred eleven billion, two hundred three million, four hundred thirty-one thousand, six hundred twenty-one".