201099999974 has 4 divisors (see below), whose sum is σ = 301649999964. Its totient is φ = 100549999986.

The previous prime is 201099999949. The next prime is 201099999983. The reversal of 201099999974 is 479999990102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479999990102 = 2 ⋅239999995051.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50274999992 + ... + 50274999995.

It is an arithmetic number, because the mean of its divisors is an integer number (75412499991).

Almost surely, 2^201099999974 is an apocalyptic number.

201099999974 is a deficient number, since it is larger than the sum of its proper divisors (100549999990).

201099999974 is a wasteful number, since it uses less digits than its factorization.

201099999974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100549999989.

The product of its (nonzero) digits is 29760696, while the sum is 68.

The spelling of 201099999974 in words is "two hundred one billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred seventy-four".