2221020221021 has 16 divisors (see below), whose sum is σ = 2597436825984. Its totient is φ = 1859388943104.

The previous prime is 2221020220963. The next prime is 2221020221039. The reversal of 2221020221021 is 1201220201222.

It is a happy number.

2221020221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2221020221021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221020221921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8856065 + ... + 9103401.

It is an arithmetic number, because the mean of its divisors is an integer number (162339801624).

Almost surely, 2^{2221020221021} is an apocalyptic number.

It is an amenable number.

2221020221021 is a deficient number, since it is larger than the sum of its proper divisors (376416604963).

2221020221021 is a wasteful number, since it uses less digits than its factorization.

2221020221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277220.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2221020221021 its reverse (1201220201222), we get a palindrome (3422240422243).

The spelling of 2221020221021 in words is "two trillion, two hundred twenty-one billion, twenty million, two hundred twenty-one thousand, twenty-one".