201111021092 has 24 divisors (see below), whose sum is σ = 354178308120. Its totient is φ = 99919134720.

The previous prime is 201111021079. The next prime is 201111021107. The reversal of 201111021092 is 290120111102.

It can be written as a sum of positive squares in 4 ways, for example, as 183754539556 + 17356481536 = 428666^2 + 131744^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181292 + ... + 659612.

It is an arithmetic number, because the mean of its divisors is an integer number (14757429505).

Almost surely, 2^201111021092 is an apocalyptic number.

It is an amenable number.

201111021092 is a deficient number, since it is larger than the sum of its proper divisors (153067287028).

201111021092 is a wasteful number, since it uses less digits than its factorization.

201111021092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478991 (or 478989 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 201111021092 its reverse (290120111102), we get a palindrome (491231132194).

The spelling of 201111021092 in words is "two hundred one billion, one hundred eleven million, twenty-one thousand, ninety-two".