1221111102110 has 16 divisors (see below), whose sum is σ = 2327294100816. Its totient is φ = 459712414848.

The previous prime is 1221111102109. The next prime is 1221111102131. The reversal of 1221111102110 is 112011111221.

It is a super-2 number, since 2×1221111102110² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3591503072 + ... + 3591503411.

It is an arithmetic number, because the mean of its divisors is an integer number (145455881301).

Almost surely, 2^{1221111102110} is an apocalyptic number.

1221111102110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221111102110 is a deficient number, since it is larger than the sum of its proper divisors (1106182998706).

1221111102110 is a wasteful number, since it uses less digits than its factorization.

1221111102110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7183006507.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1221111102110 its reverse (112011111221), we get a palindrome (1333122213331).

It can be divided in two parts, 122111 and 1102110, that added together give a palindrome (1224221).

The spelling of 1221111102110 in words is "one trillion, two hundred twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred ten".