1221122012110 has 384 divisors, whose sum is σ = 3183478381440. Its totient is φ = 330920755200.

The previous prime is 1221122012063. The next prime is 1221122012113. The reversal of 1221122012110 is 112102211221.

It is a super-2 number, since 2×1221122012110² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221122012113) by changing a digit.

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 191 ways as a sum of consecutive naturals, for example, 83305902 + ... + 83320558.

It is an arithmetic number, because the mean of its divisors is an integer number (8290308285).

Almost surely, 2^{1221122012110} is an apocalyptic number.

1221122012110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221122012110 is an abundant number, since it is smaller than the sum of its proper divisors (1962356369330).

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

1221122012110 is a wasteful number, since it uses less digits than its factorization.

1221122012110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14772 (or 14765 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1221122012110 its reverse (112102211221), we get a palindrome (1333224223331).

The spelling of 1221122012110 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, twelve thousand, one hundred ten".