2221001210021 has 12 divisors (see below), whose sum is σ = 2442354484416. Its totient is φ = 2018191587720.

The previous prime is 2221001210011. The next prime is 2221001210039. The reversal of 2221001210021 is 1200121001222.

It is not a de Polignac number, because 2221001210021 - 2¹⁴ = 2221001193637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221001209978 and 2221001210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221001210011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3820301 + ... + 4363106.

It is an arithmetic number, because the mean of its divisors is an integer number (203529540368).

Almost surely, 2^{2221001210021} is an apocalyptic number.

It is an amenable number.

2221001210021 is a deficient number, since it is larger than the sum of its proper divisors (221353274395).

2221001210021 is a wasteful number, since it uses less digits than its factorization.

2221001210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8185672 (or 8185661 counting only the distinct ones).

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

Adding to 2221001210021 its reverse (1200121001222), we get a palindrome (3421122211243).

The spelling of 2221001210021 in words is "two trillion, two hundred twenty-one billion, one million, two hundred ten thousand, twenty-one".