2221131101220 has 120 divisors (see below), whose sum is σ = 7377639474744. Its totient is φ = 557460347904.

The previous prime is 2221131101197. The next prime is 2221131101269. The reversal of 2221131101220 is 221011311222.

2221131101220 is a `hidden beast` number, since 22 + 211 + 311 + 0 + 122 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 989137658916 + 1231993442304 = 994554^2 + 1109952^2 .

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 = 2221131101193 and 2221131101202.

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, 40298007 + ... + 40353086.

Almost surely, 2^{2221131101220} is an apocalyptic number.

2221131101220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221131101220 is an abundant number, since it is smaller than the sum of its proper divisors (5156508373524).

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

2221131101220 is a wasteful number, since it uses less digits than its factorization.

2221131101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80651131 (or 80651120 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2221131101220 its reverse (221011311222), we get a palindrome (2442142412442).

The spelling of 2221131101220 in words is "two trillion, two hundred twenty-one billion, one hundred thirty-one million, one hundred one thousand, two hundred twenty".