22502220121420 has 192 divisors, whose sum is σ = 52512648935040. Its totient is φ = 8048507830272.

The previous prime is 22502220121417. The next prime is 22502220121427. The reversal of 22502220121420 is 2412102220522.

It is not an unprimeable number, because it can be changed into a prime (22502220121427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 299844142 + ... + 299919178.

It is an arithmetic number, because the mean of its divisors is an integer number (273503379870).

Almost surely, 2^{22502220121420} is an apocalyptic number.

22502220121420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22502220121420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26256324467520).

22502220121420 is an abundant number, since it is smaller than the sum of its proper divisors (30010428813620).

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

22502220121420 is a wasteful number, since it uses less digits than its factorization.

22502220121420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75404 (or 75402 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 22502220121420 its reverse (2412102220522), we get a palindrome (24914322341942).

The spelling of 22502220121420 in words is "twenty-two trillion, five hundred two billion, two hundred twenty million, one hundred twenty-one thousand, four hundred twenty".