2121111194 has 16 divisors (see below), whose sum is σ = 3207474816. Its totient is φ = 1051974000.

The previous prime is 2121111193. The next prime is 2121111217. The reversal of 2121111194 is 4911111212.

It is a super-2 number, since 2×2121111194² = 8998225394624211272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121111191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214724 + ... + 224384.

It is an arithmetic number, because the mean of its divisors is an integer number (200467176).

Almost surely, 2^2121111194 is an apocalyptic number.

2121111194 is a deficient number, since it is larger than the sum of its proper divisors (1086363622).

2121111194 is a wasteful number, since it uses less digits than its factorization.

2121111194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10541.

The product of its digits is 144, while the sum is 23.

The square root of 2121111194 is about 46055.5229478507. The cubic root of 2121111194 is about 1284.8560642628.

The spelling of 2121111194 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ninety-four".