22131121341440 has 44 divisors (see below), whose sum is σ = 53088756323916. Its totient is φ = 8852448534528.

The previous prime is 22131121341403. The next prime is 22131121341493. The reversal of 22131121341440 is 4414312113122.

It can be written as a sum of positive squares in 2 ways, for example, as 7689662104576 + 14441459236864 = 2773024^2 + 3800192^2 .

It is a super-2 number, since 2×22131121341440² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2161237199 + ... + 2161247438.

Almost surely, 2^{22131121341440} is an apocalyptic number.

22131121341440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22131121341440 is an abundant number, since it is smaller than the sum of its proper divisors (30957634982476).

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

22131121341440 is an equidigital number, since it uses as much as digits as its factorization.

22131121341440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322484662 (or 4322484644 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 22131121341440 its reverse (4414312113122), we get a palindrome (26545433454562).

The spelling of 22131121341440 in words is "twenty-two trillion, one hundred thirty-one billion, one hundred twenty-one million, three hundred forty-one thousand, four hundred forty".