22121343412 has 18 divisors (see below), whose sum is σ = 45032735202. Its totient is φ = 9480575664.

The previous prime is 22121343359. The next prime is 22121343479. The reversal of 22121343412 is 21434312122.

It can be written as a sum of positive squares in only one way, i.e., 12437602576 + 9683740836 = 111524^2 + 98406^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56431803 + ... + 56432194.

Almost surely, 2^22121343412 is an apocalyptic number.

It is an amenable number.

22121343412 is an abundant number, since it is smaller than the sum of its proper divisors (22911391790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22121343412 is a wasteful number, since it uses less digits than its factorization.

22121343412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112864015 (or 112864006 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 22121343412 its reverse (21434312122), we get a palindrome (43555655534).

The spelling of 22121343412 in words is "twenty-two billion, one hundred twenty-one million, three hundred forty-three thousand, four hundred twelve".