22121110421440 has 56 divisors (see below), whose sum is σ = 52735281445152. Its totient is φ = 8838468357120.

The previous prime is 22121110421413. The next prime is 22121110421453. The reversal of 22121110421440 is 4412401112122.

It is a congruent number.

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, 38683731 + ... + 39251410.

Almost surely, 2^{22121110421440} is an apocalyptic number.

22121110421440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121110421440 is an abundant number, since it is smaller than the sum of its proper divisors (30614171023712).

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

22121110421440 is an equidigital number, since it uses as much as digits as its factorization.

22121110421440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77936045 (or 77936035 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 22121110421440 its reverse (4412401112122), we get a palindrome (26533511533562).

The spelling of 22121110421440 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred ten million, four hundred twenty-one thousand, four hundred forty".