121121022221110 has 16 divisors (see below), whose sum is σ = 218171050030656. Its totient is φ = 48414362214528.

The previous prime is 121121022221099. The next prime is 121121022221189. The reversal of 121121022221110 is 11122220121121.

It is a happy 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, 4255819299 + ... + 4255847758.

It is an arithmetic number, because the mean of its divisors is an integer number (13635690626916).

Almost surely, 2^{121121022221110} is an apocalyptic number.

121121022221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121022221110 is a deficient number, since it is larger than the sum of its proper divisors (97050027809546).

121121022221110 is a wasteful number, since it uses less digits than its factorization.

121121022221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8511668487.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121022221110 its reverse (11122220121121), we get a palindrome (132243242342231).

The spelling of 121121022221110 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred ten".