22021201121220 has 144 divisors (see below), whose sum is σ = 77898126633600. Its totient is φ = 5033417385024.

The previous prime is 22021201121191. The next prime is 22021201121273. The reversal of 22021201121220 is 2212110212022.

It is a happy number.

22021201121220 is a `hidden beast` number, since 2 + 202 + 120 + 1 + 121 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22021201121193 and 22021201121202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178276462 + ... + 178399941.

Almost surely, 2^{22021201121220} is an apocalyptic number.

22021201121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22021201121220 is an abundant number, since it is smaller than the sum of its proper divisors (55876925512380).

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

22021201121220 is a wasteful number, since it uses less digits than its factorization.

22021201121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356676439 (or 356676420 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22021201121220 its reverse (2212110212022), we get a palindrome (24233311333242).

The spelling of 22021201121220 in words is "twenty-two trillion, twenty-one billion, two hundred one million, one hundred twenty-one thousand, two hundred twenty".