210211111101210 has 128 divisors (see below), whose sum is σ = 542170513152000. Its totient is φ = 52043791887360.

The previous prime is 210211111101149. The next prime is 210211111101281. The reversal of 210211111101210 is 12101111112012.

It is a super-2 number, since 2×210211111101210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210211111101210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20588185 + ... + 29056764.

It is an arithmetic number, because the mean of its divisors is an integer number (4235707134000).

Almost surely, 2^{210211111101210} is an apocalyptic number.

210211111101210 is an abundant number, since it is smaller than the sum of its proper divisors (331959402050790).

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

210211111101210 is a wasteful number, since it uses less digits than its factorization.

210211111101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49645176.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 210211111101210 its reverse (12101111112012), we get a palindrome (222312222213222).

The spelling of 210211111101210 in words is "two hundred ten trillion, two hundred eleven billion, one hundred eleven million, one hundred one thousand, two hundred ten".