2111212122210 has 48 divisors (see below), whose sum is σ = 5542444275264. Its totient is φ = 557523975456.

The previous prime is 2111212122193. The next prime is 2111212122247. The reversal of 2111212122210 is 122212121112.

2111212122210 is a `hidden beast` number, since 211 + 1 + 21 + 212 + 221 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113864092 + ... + 113882631.

It is an arithmetic number, because the mean of its divisors is an integer number (115467589068).

Almost surely, 2^{2111212122210} is an apocalyptic number.

2111212122210 is an abundant number, since it is smaller than the sum of its proper divisors (3431232153054).

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

2111212122210 is a wasteful number, since it uses less digits than its factorization.

2111212122210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227746839 (or 227746836 counting only the distinct ones).

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

Adding to 2111212122210 its reverse (122212121112), we get a palindrome (2233424243322).

The spelling of 2111212122210 in words is "two trillion, one hundred eleven billion, two hundred twelve million, one hundred twenty-two thousand, two hundred ten".