1222121221110 has 80 divisors (see below), whose sum is σ = 3318684514992. Its totient is φ = 322672248000.

The previous prime is 1222121221103. The next prime is 1222121221133. The reversal of 1222121221110 is 111221212221.

1222121221110 is a `hidden beast` number, since 12 + 221 + 212 + 211 + 10 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7387456 + ... + 7551075.

Almost surely, 2^{1222121221110} is an apocalyptic number.

1222121221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222121221110 is an abundant number, since it is smaller than the sum of its proper divisors (2096563293882).

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

1222121221110 is a wasteful number, since it uses less digits than its factorization.

1222121221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14938651 (or 14938642 counting only the distinct ones).

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

Adding to 1222121221110 its reverse (111221212221), we get a palindrome (1333342433331).

It can be divided in two parts, 12221212211 and 10, that added together give a palindrome (12221212221).

The spelling of 1222121221110 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".