2221121112020 has 36 divisors (see below), whose sum is σ = 4954867766940. Its totient is φ = 836186769408.

The previous prime is 2221121111981. The next prime is 2221121112113. The reversal of 2221121112020 is 202111211222.

It can be written as a sum of positive squares in 6 ways, for example, as 59527216324 + 2161593895696 = 243982^2 + 1470236^2 .

It is a super-2 number, since 2×2221121112020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 2221121112020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192132725 + ... + 192144284.

Almost surely, 2^{2221121112020} is an apocalyptic number.

2221121112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221121112020 is an abundant number, since it is smaller than the sum of its proper divisors (2733746654920).

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

2221121112020 is a wasteful number, since it uses less digits than its factorization.

2221121112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384277052 (or 384277033 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2221121112020 its reverse (202111211222), we get a palindrome (2423232323242).

The spelling of 2221121112020 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred twelve thousand, twenty".