111551401403 has 4 divisors (see below), whose sum is σ = 120132278448. Its totient is φ = 102970524360.

The previous prime is 111551401301. The next prime is 111551401427. The reversal of 111551401403 is 304104155111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111551401403 - 2²⁰ = 111550352827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111551401463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4290438503 + ... + 4290438528.

It is an arithmetic number, because the mean of its divisors is an integer number (30033069612).

Almost surely, 2^111551401403 is an apocalyptic number.

111551401403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111551401403 is a deficient number, since it is larger than the sum of its proper divisors (8580877045).

111551401403 is an equidigital number, since it uses as much as digits as its factorization.

111551401403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8580877044.

The product of its (nonzero) digits is 1200, while the sum is 26.

Adding to 111551401403 its reverse (304104155111), we get a palindrome (415655556514).

The spelling of 111551401403 in words is "one hundred eleven billion, five hundred fifty-one million, four hundred one thousand, four hundred three".