21012012202002 has 8 divisors (see below), whose sum is σ = 42024024404016. Its totient is φ = 7004004067332.

The previous prime is 21012012201989. The next prime is 21012012202009. The reversal of 21012012202002 is 20020221021012.

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

21012012202002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (21012012202009) 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, 1751001016828 + ... + 1751001016839.

It is an arithmetic number, because the mean of its divisors is an integer number (5253003050502).

Almost surely, 2^{21012012202002} is an apocalyptic number.

21012012202002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21012012202002 is a wasteful number, since it uses less digits than its factorization.

21012012202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502002033672.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21012012202002 its reverse (20020221021012), we get a palindrome (41032233223014).

The spelling of 21012012202002 in words is "twenty-one trillion, twelve billion, twelve million, two hundred two thousand, two".