1221010110110 has 16 divisors (see below), whose sum is σ = 2511792226656. Its totient is φ = 418632037728.

The previous prime is 1221010110101. The next prime is 1221010110181. The reversal of 1221010110110 is 110110101221.

It is a junction number, because it is equal to n+sod(n) for n = 1221010110091 and 1221010110100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8721500717 + ... + 8721500856.

It is an arithmetic number, because the mean of its divisors is an integer number (156987014166).

Almost surely, 2^{1221010110110} is an apocalyptic number.

1221010110110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221010110110 is an abundant number, since it is smaller than the sum of its proper divisors (1290782116546).

1221010110110 is a wasteful number, since it uses less digits than its factorization.

1221010110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17443001587.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1221010110110 its reverse (110110101221), we get a palindrome (1331120211331).

The spelling of 1221010110110 in words is "one trillion, two hundred twenty-one billion, ten million, one hundred ten thousand, one hundred ten".