2221231201021 has 16 divisors (see below), whose sum is σ = 2563615764864. Its totient is φ = 1885131719424.

The previous prime is 2221231201009. The next prime is 2221231201027. The reversal of 2221231201021 is 1201021321222.

It is a cyclic number.

It is not a de Polignac number, because 2221231201021 - 2¹⁵ = 2221231168253 is a prime.

It is a super-2 number, since 2×2221231201021² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2221231201021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221231201027) 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, 657721 + ... + 2207953.

It is an arithmetic number, because the mean of its divisors is an integer number (160225985304).

Almost surely, 2^{2221231201021} is an apocalyptic number.

It is an amenable number.

2221231201021 is a deficient number, since it is larger than the sum of its proper divisors (342384563843).

2221231201021 is a wasteful number, since it uses less digits than its factorization.

2221231201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552260.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2221231201021 its reverse (1201021321222), we get a palindrome (3422252522243).

The spelling of 2221231201021 in words is "two trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred one thousand, twenty-one".