2121630246521 has 8 divisors (see below), whose sum is σ = 2214282057984. Its totient is φ = 2029012353280.

The previous prime is 2121630246509. The next prime is 2121630246539. The reversal of 2121630246521 is 1256420361212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121630246521 - 2⁶ = 2121630246457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121630249521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8351681 + ... + 8601966.

It is an arithmetic number, because the mean of its divisors is an integer number (276785257248).

Almost surely, 2^{2121630246521} is an apocalyptic number.

It is an amenable number.

2121630246521 is a deficient number, since it is larger than the sum of its proper divisors (92651811463).

2121630246521 is a wasteful number, since it uses less digits than its factorization.

2121630246521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16959111.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 2121630246521 in words is "two trillion, one hundred twenty-one billion, six hundred thirty million, two hundred forty-six thousand, five hundred twenty-one".