2221202021200 has 60 divisors (see below), whose sum is σ = 5337267482428. Its totient is φ = 888342681600.

The previous prime is 2221202021117. The next prime is 2221202021221. The reversal of 2221202021200 is 21202021222.

It can be written as a sum of positive squares in 6 ways, for example, as 45069591616 + 2176132429584 = 212296^2 + 1475172^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 2163994 + ... + 3020806.

Almost surely, 2^{2221202021200} is an apocalyptic number.

2221202021200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221202021200 is an abundant number, since it is smaller than the sum of its proper divisors (3116065461228).

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

2221202021200 is a wasteful number, since it uses less digits than its factorization.

2221202021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863312 (or 863301 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2221202021200 its reverse (21202021222), we get a palindrome (2242404042422).

The spelling of 2221202021200 in words is "two trillion, two hundred twenty-one billion, two hundred two million, twenty-one thousand, two hundred".