210001211122122 has 96 divisors (see below), whose sum is σ = 535388952144384. Its totient is φ = 58233131712000.

The previous prime is 210001211122081. The next prime is 210001211122127. The reversal of 210001211122122 is 221221112100012.

210001211122122 is a `hidden beast` number, since 210 + 0 + 0 + 1 + 211 + 1 + 221 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210001211122095 and 210001211122104.

It is not an unprimeable number, because it can be changed into a prime (210001211122127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54296754 + ... + 58035677.

It is an arithmetic number, because the mean of its divisors is an integer number (5576968251504).

Almost surely, 2^{210001211122122} is an apocalyptic number.

210001211122122 is an abundant number, since it is smaller than the sum of its proper divisors (325387741022262).

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

210001211122122 is a wasteful number, since it uses less digits than its factorization.

210001211122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112332884 (or 112332881 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210001211122122 its reverse (221221112100012), we get a palindrome (431222323222134).

The spelling of 210001211122122 in words is "two hundred ten trillion, one billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-two".