210121122221022 has 16 divisors (see below), whose sum is σ = 420294519976320. Its totient is φ = 70031661484632.

The previous prime is 210121122220973. The next prime is 210121122221027. The reversal of 210121122221022 is 220122221121012.

It is a self number, because there is not a number n which added to its sum of digits gives 210121122221022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121122221027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2178095008 + ... + 2178191475.

It is an arithmetic number, because the mean of its divisors is an integer number (26268407498520).

Almost surely, 2^{210121122221022} is an apocalyptic number.

210121122221022 is an abundant number, since it is smaller than the sum of its proper divisors (210173397755298).

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

210121122221022 is a wasteful number, since it uses less digits than its factorization.

210121122221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356294527.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 210121122221022 its reverse (220122221121012), we get a palindrome (430243343342034).

The spelling of 210121122221022 in words is "two hundred ten trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-two".