2220121200021 has 16 divisors (see below), whose sum is σ = 3062298830400. Its totient is φ = 1429014274688.

The previous prime is 2220121200007. The next prime is 2220121200107. The reversal of 2220121200021 is 1200021210222.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220121200021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220121240021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4510945 + ... + 4978841.

It is an arithmetic number, because the mean of its divisors is an integer number (191393676900).

Almost surely, 2^{2220121200021} is an apocalyptic number.

It is an amenable number.

2220121200021 is a deficient number, since it is larger than the sum of its proper divisors (842177630379).

2220121200021 is a wasteful number, since it uses less digits than its factorization.

2220121200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522468.

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

Adding to 2220121200021 its reverse (1200021210222), we get a palindrome (3420142410243).

The spelling of 2220121200021 in words is "two trillion, two hundred twenty billion, one hundred twenty-one million, two hundred thousand, twenty-one".