210121210122 has 32 divisors (see below), whose sum is σ = 429278179200. Its totient is φ = 68545984320.

The previous prime is 210121210037. The next prime is 210121210127. The reversal of 210121210122 is 221012121012.

It is not an unprimeable number, because it can be changed into a prime (210121210127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1369633 + ... + 1515300.

It is an arithmetic number, because the mean of its divisors is an integer number (13414943100).

Almost surely, 2^210121210122 is an apocalyptic number.

210121210122 is an abundant number, since it is smaller than the sum of its proper divisors (219156969078).

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

210121210122 is a wasteful number, since it uses less digits than its factorization.

210121210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885198.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210121210122 its reverse (221012121012), we get a palindrome (431133331134).

It can be divided in two parts, 21012121012 and 2, that multiplied together give a palindrome (42024242024).

The spelling of 210121210122 in words is "two hundred ten billion, one hundred twenty-one million, two hundred ten thousand, one hundred twenty-two".