22111222021000 has 96 divisors (see below), whose sum is σ = 60187648973400. Its totient is φ = 7580990390400.

The previous prime is 22111222020959. The next prime is 22111222021003. The reversal of 22111222021000 is 12022211122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13778335238724 + 8332886782276 = 3711918^2 + 2886674^2 .

It is a super-2 number, since 2×22111222021000² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22111222021003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225575715 + ... + 225673714.

Almost surely, 2^{22111222021000} is an apocalyptic number.

22111222021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22111222021000 is an abundant number, since it is smaller than the sum of its proper divisors (38076426952400).

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

22111222021000 is a wasteful number, since it uses less digits than its factorization.

22111222021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451249464 (or 451249443 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22111222021000 its reverse (12022211122), we get a palindrome (22123244232122).

The spelling of 22111222021000 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, twenty-one thousand".