21167049122 has 4 divisors (see below), whose sum is σ = 31750573686. Its totient is φ = 10583524560.

The previous prime is 21167049103. The next prime is 21167049139. The reversal of 21167049122 is 22194076112.

It is a Cunningham number, because it is equal to 145489²+1.

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., 21167049121 + 1 = 145489^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5291762279 + ... + 5291762282.

Almost surely, 2^21167049122 is an apocalyptic number.

21167049122 is a deficient number, since it is larger than the sum of its proper divisors (10583524564).

21167049122 is a wasteful number, since it uses less digits than its factorization.

21167049122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583524563.

The product of its (nonzero) digits is 12096, while the sum is 35.

The spelling of 21167049122 in words is "twenty-one billion, one hundred sixty-seven million, forty-nine thousand, one hundred twenty-two".