2211221021000 has 64 divisors (see below), whose sum is σ = 5227600276080. Its totient is φ = 875369932800.

The previous prime is 2211221020969. The next prime is 2211221021011. The reversal of 2211221021000 is 1201221122.

It can be written as a sum of positive squares in 8 ways, for example, as 6037600804 + 2205183420196 = 77702^2 + 1484986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11301047 + ... + 11495046.

Almost surely, 2^{2211221021000} is an apocalyptic number.

2211221021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211221021000 is an abundant number, since it is smaller than the sum of its proper divisors (3016379255080).

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

2211221021000 is a wasteful number, since it uses less digits than its factorization.

2211221021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22796211 (or 22796197 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2211221021000 its reverse (1201221122), we get a palindrome (2212422242122).

The spelling of 2211221021000 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, twenty-one thousand".