2121112212210 has 48 divisors (see below), whose sum is σ = 5516295595200. Its totient is φ = 565485939360.

The previous prime is 2121112212203. The next prime is 2121112212211. The reversal of 2121112212210 is 122122111212.

2121112212210 is a `hidden beast` number, since 21 + 211 + 1 + 221 + 2 + 210 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (2121112212211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2643910 + ... + 3351489.

It is an arithmetic number, because the mean of its divisors is an integer number (114922824900).

Almost surely, 2^{2121112212210} is an apocalyptic number.

2121112212210 is an abundant number, since it is smaller than the sum of its proper divisors (3395183382990).

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

2121112212210 is a wasteful number, since it uses less digits than its factorization.

2121112212210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999343 (or 5999340 counting only the distinct ones).

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

Adding to 2121112212210 its reverse (122122111212), we get a palindrome (2243234323422).

The spelling of 2121112212210 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred twelve thousand, two hundred ten".