1221101102110 has 32 divisors (see below), whose sum is σ = 2260152683712. Its totient is φ = 474715326720.

The previous prime is 1221101102101. The next prime is 1221101102119. The reversal of 1221101102110 is 112011011221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1221101102101) and next prime (1221101102119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221101102119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5554329 + ... + 5769988.

It is an arithmetic number, because the mean of its divisors is an integer number (70629771366).

Almost surely, 2^{1221101102110} is an apocalyptic number.

1221101102110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221101102110 is a deficient number, since it is larger than the sum of its proper divisors (1039051581602).

1221101102110 is a wasteful number, since it uses less digits than its factorization.

1221101102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11324628.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1221101102110 its reverse (112011011221), we get a palindrome (1333112113331).

The spelling of 1221101102110 in words is "one trillion, two hundred twenty-one billion, one hundred one million, one hundred two thousand, one hundred ten".