21223412240120 has 16 divisors (see below), whose sum is σ = 47752677540360. Its totient is φ = 8489364896032.

The previous prime is 21223412240117. The next prime is 21223412240171. The reversal of 21223412240120 is 2104221432212.

It is a happy number.

It is a super-2 number, since 2×21223412240120² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21223412240120.

It is a congruent number.

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, 265292652962 + ... + 265292653041.

Almost surely, 2^{21223412240120} is an apocalyptic number.

21223412240120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223412240120 is an abundant number, since it is smaller than the sum of its proper divisors (26529265300240).

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

21223412240120 is a wasteful number, since it uses less digits than its factorization.

21223412240120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530585306014 (or 530585306010 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 21223412240120 its reverse (2104221432212), we get a palindrome (23327633672332).

The spelling of 21223412240120 in words is "twenty-one trillion, two hundred twenty-three billion, four hundred twelve million, two hundred forty thousand, one hundred twenty".