210002222121 has 32 divisors (see below), whose sum is σ = 290165239680. Its totient is φ = 134993723904.

The previous prime is 210002222093. The next prime is 210002222141. The reversal of 210002222121 is 121222200012.

It is not a de Polignac number, because 210002222121 - 2¹⁴ = 210002205737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210002222121.

It is not an unprimeable number, because it can be changed into a prime (210002222141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5993070 + ... + 6028008.

It is an arithmetic number, because the mean of its divisors is an integer number (9067663740).

Almost surely, 2^210002222121 is an apocalyptic number.

It is an amenable number.

210002222121 is a deficient number, since it is larger than the sum of its proper divisors (80163017559).

210002222121 is a wasteful number, since it uses less digits than its factorization.

210002222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35465.

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

Adding to 210002222121 its reverse (121222200012), we get a palindrome (331224422133).

The spelling of 210002222121 in words is "two hundred ten billion, two million, two hundred twenty-two thousand, one hundred twenty-one".