1212110221110 has 32 divisors (see below), whose sum is σ = 2952483409152. Its totient is φ = 318405072480.

The previous prime is 1212110221087. The next prime is 1212110221163. The reversal of 1212110221110 is 111220112121.

It is a happy number.

It is a super-2 number, since 2×1212110221110² (a number of 25 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 1212110221110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301517946 + ... + 301521965.

It is an arithmetic number, because the mean of its divisors is an integer number (92265106536).

Almost surely, 2^{1212110221110} is an apocalyptic number.

1212110221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212110221110 is an abundant number, since it is smaller than the sum of its proper divisors (1740373188042).

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

1212110221110 is a wasteful number, since it uses less digits than its factorization.

1212110221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603039988.

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

Adding to 1212110221110 its reverse (111220112121), we get a palindrome (1323330333231).

The spelling of 1212110221110 in words is "one trillion, two hundred twelve billion, one hundred ten million, two hundred twenty-one thousand, one hundred ten".