2202121220021 has 16 divisors (see below), whose sum is σ = 2216969894400. Its totient is φ = 2187314046720.

The previous prime is 2202121219939. The next prime is 2202121220023. The reversal of 2202121220021 is 1200221212022.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2202121220021 - 2¹⁴ = 2202121203637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202121220023) 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, 328524356 + ... + 328531058.

It is an arithmetic number, because the mean of its divisors is an integer number (138560618400).

Almost surely, 2^{2202121220021} is an apocalyptic number.

It is an amenable number.

2202121220021 is a deficient number, since it is larger than the sum of its proper divisors (14848674379).

2202121220021 is a wasteful number, since it uses less digits than its factorization.

2202121220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9476.

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

Adding to 2202121220021 its reverse (1200221212022), we get a palindrome (3402342432043).

The spelling of 2202121220021 in words is "two trillion, two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, twenty-one".