21602160122 has 4 divisors (see below), whose sum is σ = 32403240186. Its totient is φ = 10801080060.

The previous prime is 21602160109. The next prime is 21602160149. The reversal of 21602160122 is 22106120612.

It is a happy number.

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., 21532921081 + 69239041 = 146741^2 + 8321^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5400540029 + ... + 5400540032.

Almost surely, 2^21602160122 is an apocalyptic number.

21602160122 is a deficient number, since it is larger than the sum of its proper divisors (10801080064).

21602160122 is a wasteful number, since it uses less digits than its factorization.

21602160122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10801080063.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21602160122 its reverse (22106120612), we get a palindrome (43708280734).

The spelling of 21602160122 in words is "twenty-one billion, six hundred two million, one hundred sixty thousand, one hundred twenty-two".