210021121122202 has 64 divisors (see below), whose sum is σ = 359136196675200. Its totient is φ = 91312944986880.

The previous prime is 210021121122193. The next prime is 210021121122209. The reversal of 210021121122202 is 202221121120012.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 210021121122202.

It is not an unprimeable number, because it can be changed into a prime (210021121122209) 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, 1870772752 + ... + 1870885012.

It is an arithmetic number, because the mean of its divisors is an integer number (5611503073050).

Almost surely, 2^{210021121122202} is an apocalyptic number.

210021121122202 is a deficient number, since it is larger than the sum of its proper divisors (149115075552998).

210021121122202 is a wasteful number, since it uses less digits than its factorization.

210021121122202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133631.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210021121122202 its reverse (202221121120012), we get a palindrome (412242242242214).

The spelling of 210021121122202 in words is "two hundred ten trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred two".