12022061621 has 16 divisors (see below), whose sum is σ = 12549427200. Its totient is φ = 11502691200.

The previous prime is 12022061617. The next prime is 12022061627. The reversal of 12022061621 is 12616022021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12022061621 - 2² = 12022061617 is a prime.

It is a super-2 number, since 2×12022061621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12022061627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1497065 + ... + 1505073.

It is an arithmetic number, because the mean of its divisors is an integer number (784339200).

Almost surely, 2^12022061621 is an apocalyptic number.

It is an amenable number.

12022061621 is a deficient number, since it is larger than the sum of its proper divisors (527365579).

12022061621 is a wasteful number, since it uses less digits than its factorization.

12022061621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8500.

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

Adding to 12022061621 its reverse (12616022021), we get a palindrome (24638083642).

The spelling of 12022061621 in words is "twelve billion, twenty-two million, sixty-one thousand, six hundred twenty-one".