21120312321122 has 16 divisors (see below), whose sum is σ = 36247533921600. Its totient is φ = 9041241366288.

The previous prime is 21120312321109. The next prime is 21120312321131. The reversal of 21120312321122 is 22112321302112.

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, 860075372 + ... + 860099927.

It is an arithmetic number, because the mean of its divisors is an integer number (2265470870100).

Almost surely, 2^{21120312321122} is an apocalyptic number.

21120312321122 is a deficient number, since it is larger than the sum of its proper divisors (15127221600478).

21120312321122 is a wasteful number, since it uses less digits than its factorization.

21120312321122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720176185.

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

Adding to 21120312321122 its reverse (22112321302112), we get a palindrome (43232633623234).

The spelling of 21120312321122 in words is "twenty-one trillion, one hundred twenty billion, three hundred twelve million, three hundred twenty-one thousand, one hundred twenty-two".