2221210120000 has 70 divisors (see below), whose sum is σ = 5507879303498. Its totient is φ = 888484032000.

The previous prime is 2221210119949. The next prime is 2221210120001. The reversal of 2221210120000 is 210121222.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 1281985533504 + 939224586496 = 1132248^2 + 969136^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221210120001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27725127 + ... + 27805126.

Almost surely, 2^{2221210120000} is an apocalyptic number.

2221210120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221210120000 is an abundant number, since it is smaller than the sum of its proper divisors (3286669183498).

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

2221210120000 is an frugal number, since it uses more digits than its factorization.

2221210120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55530285 (or 55530260 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2221210120000 its reverse (210121222), we get a palindrome (2221420241222).

The spelling of 2221210120000 in words is "two trillion, two hundred twenty-one billion, two hundred ten million, one hundred twenty thousand".