22120221121220 has 24 divisors (see below), whose sum is σ = 46453491268800. Its totient is φ = 8847892845792.

The previous prime is 22120221121123. The next prime is 22120221121231. The reversal of 22120221121220 is 2212112202122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 22120221121192 and 22120221121201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11296130 + ... + 13108889.

It is an arithmetic number, because the mean of its divisors is an integer number (1935562136200).

Almost surely, 2^{22120221121220} is an apocalyptic number.

22120221121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120221121220 is an abundant number, since it is smaller than the sum of its proper divisors (24333270147580).

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

22120221121220 is a wasteful number, since it uses less digits than its factorization.

22120221121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24450347 (or 24450345 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22120221121220 its reverse (2212112202122), we get a palindrome (24332333323342).

The spelling of 22120221121220 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty".