21110100122 has 4 divisors (see below), whose sum is σ = 31665150186. Its totient is φ = 10555050060.

The previous prime is 21110100083. The next prime is 21110100133. The reversal of 21110100122 is 22100101112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11759016721 + 9351083401 = 108439^2 + 96701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5277525029 + ... + 5277525032.

Almost surely, 2^21110100122 is an apocalyptic number.

21110100122 is a deficient number, since it is larger than the sum of its proper divisors (10555050064).

21110100122 is a wasteful number, since it uses less digits than its factorization.

21110100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555050063.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21110100122 its reverse (22100101112), we get a palindrome (43210201234).

The spelling of 21110100122 in words is "twenty-one billion, one hundred ten million, one hundred thousand, one hundred twenty-two".