2121636345002 has 32 divisors (see below), whose sum is σ = 3279371916240. Its totient is φ = 1028970708480.

The previous prime is 2121636344939. The next prime is 2121636345011. The reversal of 2121636345002 is 2005436361212.

It can be written as a sum of positive squares in 8 ways, for example, as 1605266194081 + 516370150921 = 1266991^2 + 718589^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131435852 + ... + 131451992.

Almost surely, 2^{2121636345002} is an apocalyptic number.

2121636345002 is a deficient number, since it is larger than the sum of its proper divisors (1157735571238).

2121636345002 is a wasteful number, since it uses less digits than its factorization.

2121636345002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30218.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 2121636345002 in words is "two trillion, one hundred twenty-one billion, six hundred thirty-six million, three hundred forty-five thousand, two".