2213515601221 has 4 divisors (see below), whose sum is σ = 2219681383200. Its totient is φ = 2207349819244.

The previous prime is 2213515601203. The next prime is 2213515601239. The reversal of 2213515601221 is 1221065153122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2213515601203) and next prime (2213515601239).

It is a cyclic number.

It is not a de Polignac number, because 2213515601221 - 2³¹ = 2211368117573 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 (2213515601251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3082890451 + ... + 3082891168.

It is an arithmetic number, because the mean of its divisors is an integer number (554920345800).

Almost surely, 2^{2213515601221} is an apocalyptic number.

It is an amenable number.

2213515601221 is a deficient number, since it is larger than the sum of its proper divisors (6165781979).

2213515601221 is an equidigital number, since it uses as much as digits as its factorization.

2213515601221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165781978.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 2213515601221 in words is "two trillion, two hundred thirteen billion, five hundred fifteen million, six hundred one thousand, two hundred twenty-one".