2152801949221 has 16 divisors (see below), whose sum is σ = 2688200108928. Its totient is φ = 1674890956800.

The previous prime is 2152801949203. The next prime is 2152801949261. The reversal of 2152801949221 is 1229491082512.

It is a cyclic number.

It is not a de Polignac number, because 2152801949221 - 2⁵ = 2152801949189 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 (2152801949261) 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, 21759120 + ... + 21857833.

It is an arithmetic number, because the mean of its divisors is an integer number (168012506808).

Almost surely, 2^{2152801949221} is an apocalyptic number.

It is an amenable number.

2152801949221 is a deficient number, since it is larger than the sum of its proper divisors (535398159707).

2152801949221 is a wasteful number, since it uses less digits than its factorization.

2152801949221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43617612.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 2152801949221 in words is "two trillion, one hundred fifty-two billion, eight hundred one million, nine hundred forty-nine thousand, two hundred twenty-one".