211211210100210 has 64 divisors (see below), whose sum is σ = 507028032895104. Its totient is φ = 56309532364800.

The previous prime is 211211210100197. The next prime is 211211210100211. The reversal of 211211210100210 is 12001012112112.

It is a happy number.

It is a super-2 number, since 2×211211210100210² (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 self number, because there is not a number n which added to its sum of digits gives 211211210100210.

It is not an unprimeable number, because it can be changed into a prime (211211210100211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2309358802 + ... + 2309450258.

It is an arithmetic number, because the mean of its divisors is an integer number (7922313013986).

Almost surely, 2^{211211210100210} is an apocalyptic number.

211211210100210 is an abundant number, since it is smaller than the sum of its proper divisors (295816822794894).

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

211211210100210 is a wasteful number, since it uses less digits than its factorization.

211211210100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109019.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211211210100210 its reverse (12001012112112), we get a palindrome (223212222212322).

The spelling of 211211210100210 in words is "two hundred eleven trillion, two hundred eleven billion, two hundred ten million, one hundred thousand, two hundred ten".