210002121210001 has 4 divisors (see below), whose sum is σ = 221054864431600. Its totient is φ = 198949377988404.

The previous prime is 210002121209989. The next prime is 210002121210029. The reversal of 210002121210001 is 100012121200012.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210002121210001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210002121210071) 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, 5526371610771 + ... + 5526371610808.

It is an arithmetic number, because the mean of its divisors is an integer number (55263716107900).

Almost surely, 2^{210002121210001} is an apocalyptic number.

It is an amenable number.

210002121210001 is a deficient number, since it is larger than the sum of its proper divisors (11052743221599).

210002121210001 is a wasteful number, since it uses less digits than its factorization.

210002121210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11052743221598.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210002121210001 its reverse (100012121200012), we get a palindrome (310014242410013).

The spelling of 210002121210001 in words is "two hundred ten trillion, two billion, one hundred twenty-one million, two hundred ten thousand, one".