21210001210122 has 16 divisors (see below), whose sum is σ = 42433221530880. Its totient is φ = 7067797218272.

The previous prime is 21210001210061. The next prime is 21210001210169. The reversal of 21210001210122 is 22101210001212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550775418 + ... + 550813925.

It is an arithmetic number, because the mean of its divisors is an integer number (2652076345680).

Almost surely, 2^{21210001210122} is an apocalyptic number.

21210001210122 is an abundant number, since it is smaller than the sum of its proper divisors (21223220320758).

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

21210001210122 is a wasteful number, since it uses less digits than its factorization.

21210001210122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101592557.

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

Adding to 21210001210122 its reverse (22101210001212), we get a palindrome (43311211211334).

The spelling of 21210001210122 in words is "twenty-one trillion, two hundred ten billion, one million, two hundred ten thousand, one hundred twenty-two".