22121300324440 has 64 divisors (see below), whose sum is σ = 52472398829760. Its totient is φ = 8376546140160.

The previous prime is 22121300324411. The next prime is 22121300324443. The reversal of 22121300324440 is 4442300312122.

It is a super-2 number, since 2×22121300324440² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22121300324399 and 22121300324408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121300324443) 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, 123853501 + ... + 124031980.

It is an arithmetic number, because the mean of its divisors is an integer number (819881231715).

Almost surely, 2^{22121300324440} is an apocalyptic number.

22121300324440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121300324440 is an abundant number, since it is smaller than the sum of its proper divisors (30351098505320).

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

22121300324440 is a wasteful number, since it uses less digits than its factorization.

22121300324440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247885612 (or 247885608 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 22121300324440 its reverse (4442300312122), we get a palindrome (26563600636562).

The spelling of 22121300324440 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred million, three hundred twenty-four thousand, four hundred forty".