201111993602 has 24 divisors (see below), whose sum is σ = 329037859836. Its totient is φ = 91645897824.

The previous prime is 201111993521. The next prime is 201111993623. The reversal of 201111993602 is 206399111102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199298852041 + 1813141561 = 446429^2 + 42581^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 457433 + ... + 781964.

Almost surely, 2^201111993602 is an apocalyptic number.

201111993602 is a deficient number, since it is larger than the sum of its proper divisors (127925866234).

201111993602 is a wasteful number, since it uses less digits than its factorization.

201111993602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239570 (or 1239491 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 201111993602 in words is "two hundred one billion, one hundred eleven million, nine hundred ninety-three thousand, six hundred two".