2221220010021 has 32 divisors (see below), whose sum is σ = 3129286266240. Its totient is φ = 1399439897856.

The previous prime is 2221220010001. The next prime is 2221220010049. The reversal of 2221220010021 is 1200100221222.

It is not a de Polignac number, because 2221220010021 - 2⁹ = 2221220009509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221220010001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298426 + ... + 2128731.

It is an arithmetic number, because the mean of its divisors is an integer number (97790195820).

Almost surely, 2^{2221220010021} is an apocalyptic number.

It is an amenable number.

2221220010021 is a deficient number, since it is larger than the sum of its proper divisors (908066256219).

2221220010021 is a wasteful number, since it uses less digits than its factorization.

2221220010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427413.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2221220010021 its reverse (1200100221222), we get a palindrome (3421320231243).

The spelling of 2221220010021 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, ten thousand, twenty-one".