11785121403 has 16 divisors (see below), whose sum is σ = 17147500416. Its totient is φ = 7140203840.

The previous prime is 11785121357. The next prime is 11785121407. The reversal of 11785121403 is 30412158711.

It is not a de Polignac number, because 11785121403 - 2⁸ = 11785121147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (11785121407) 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, 49951 + ... + 161447.

It is an arithmetic number, because the mean of its divisors is an integer number (1071718776).

Almost surely, 2^11785121403 is an apocalyptic number.

11785121403 is a deficient number, since it is larger than the sum of its proper divisors (5362379013).

11785121403 is a wasteful number, since it uses less digits than its factorization.

11785121403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114714.

The product of its (nonzero) digits is 6720, while the sum is 33.

The spelling of 11785121403 in words is "eleven billion, seven hundred eighty-five million, one hundred twenty-one thousand, four hundred three".