22121111220000 has 240 divisors, whose sum is σ = 78143338627200. Its totient is φ = 5445196416000.

The previous prime is 22121111219989. The next prime is 22121111220017. The reversal of 22121111220000 is 2211112122.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-3 number, since 3×22121111220000³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13400200 + ... + 14960199.

It is an arithmetic number, because the mean of its divisors is an integer number (325597244280).

Almost surely, 2^{22121111220000} is an apocalyptic number.

22121111220000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121111220000 is an abundant number, since it is smaller than the sum of its proper divisors (56022227407200).

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

22121111220000 is a wasteful number, since it uses less digits than its factorization.

22121111220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28360445 (or 28360422 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22121111220000 its reverse (2211112122), we get a palindrome (22123322332122).

The spelling of 22121111220000 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty thousand".