22121241252240 has 160 divisors (see below), whose sum is σ = 74414661906816. Its totient is φ = 5403661885440.

The previous prime is 22121241252223. The next prime is 22121241252241. The reversal of 22121241252240 is 4225214212122.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22121241252198 and 22121241252207.

It is not an unprimeable number, because it can be changed into a prime (22121241252241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26652889 + ... + 27470328.

Almost surely, 2^{22121241252240} is an apocalyptic number.

22121241252240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121241252240 is an abundant number, since it is smaller than the sum of its proper divisors (52293420654576).

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

22121241252240 is a wasteful number, since it uses less digits than its factorization.

22121241252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54123377 (or 54123371 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 22121241252240 its reverse (4225214212122), we get a palindrome (26346455464362).

The spelling of 22121241252240 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred forty-one million, two hundred fifty-two thousand, two hundred forty".