111356401261 has 16 divisors (see below), whose sum is σ = 128544853248. Its totient is φ = 94492368000.

The previous prime is 111356401259. The next prime is 111356401357. The reversal of 111356401261 is 162104653111.

It is a cyclic number.

It is not a de Polignac number, because 111356401261 - 2¹ = 111356401259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111356401861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129921 + ... + 489481.

It is an arithmetic number, because the mean of its divisors is an integer number (8034053328).

Almost surely, 2^111356401261 is an apocalyptic number.

It is an amenable number.

111356401261 is a deficient number, since it is larger than the sum of its proper divisors (17188451987).

111356401261 is a wasteful number, since it uses less digits than its factorization.

111356401261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360012.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 111356401261 in words is "one hundred eleven billion, three hundred fifty-six million, four hundred one thousand, two hundred sixty-one".