12211121212110 has 96 divisors (see below), whose sum is σ = 34024689541440. Its totient is φ = 3030539111424.

The previous prime is 12211121212009. The next prime is 12211121212117. The reversal of 12211121212110 is 1121212111221.

It is a happy number.

12211121212110 is a `hidden beast` number, since 1 + 221 + 1 + 121 + 212 + 110 = 666.

It is a super-2 number, since 2×12211121212110² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211121212117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79640875 + ... + 79794054.

It is an arithmetic number, because the mean of its divisors is an integer number (354423849390).

Almost surely, 2^{12211121212110} is an apocalyptic number.

12211121212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12211121212110 is an abundant number, since it is smaller than the sum of its proper divisors (21813568329330).

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

12211121212110 is a wasteful number, since it uses less digits than its factorization.

12211121212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159435002 (or 159434999 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12211121212110 its reverse (1121212111221), we get a palindrome (13332333323331).

The spelling of 12211121212110 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, two hundred twelve thousand, one hundred ten".