2121302120202 has 24 divisors (see below), whose sum is σ = 4607969916420. Its totient is φ = 705282964800.

The previous prime is 2121302120191. The next prime is 2121302120213. The reversal of 2121302120202 is 2020212031212.

2121302120202 is a `hidden beast` number, since 21 + 21 + 302 + 120 + 202 = 666.

It is an interprime number because it is at equal distance from previous prime (2121302120191) and next prime (2121302120213).

It can be written as a sum of positive squares in 2 ways, for example, as 2071466469081 + 49835651121 = 1439259^2 + 223239^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151471299 + ... + 151485302.

Almost surely, 2^{2121302120202} is an apocalyptic number.

2121302120202 is an abundant number, since it is smaller than the sum of its proper divisors (2486667796218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121302120202 is a wasteful number, since it uses less digits than its factorization.

2121302120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302956998 (or 302956995 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 2121302120202 its reverse (2020212031212), we get a palindrome (4141514151414).

It can be divided in two parts, 212130 and 2120202, that added together give a palindrome (2332332).

The spelling of 2121302120202 in words is "two trillion, one hundred twenty-one billion, three hundred two million, one hundred twenty thousand, two hundred two".