21112321194 has 16 divisors (see below), whose sum is σ = 46916269440. Its totient is φ = 7037440380.

The previous prime is 21112321187. The next prime is 21112321201. The reversal of 21112321194 is 49112321112.

It is an interprime number because it is at equal distance from previous prime (21112321187) and next prime (21112321201).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195484402 + ... + 195484509.

It is an arithmetic number, because the mean of its divisors is an integer number (2932266840).

Almost surely, 2^21112321194 is an apocalyptic number.

21112321194 is an abundant number, since it is smaller than the sum of its proper divisors (25803948246).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112321194 is a wasteful number, since it uses less digits than its factorization.

21112321194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390968922 (or 390968916 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The spelling of 21112321194 in words is "twenty-one billion, one hundred twelve million, three hundred twenty-one thousand, one hundred ninety-four".