121010220111 has 16 divisors (see below), whose sum is σ = 176104172160. Its totient is φ = 73302316320.

The previous prime is 121010220043. The next prime is 121010220113. The reversal of 121010220111 is 111022010121.

It is not a de Polignac number, because 121010220111 - 2²² = 121006025807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010220113) 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 15 ways as a sum of consecutive naturals, for example, 864181 + ... + 994398.

It is an arithmetic number, because the mean of its divisors is an integer number (11006510760).

Almost surely, 2^121010220111 is an apocalyptic number.

121010220111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121010220111 is a deficient number, since it is larger than the sum of its proper divisors (55093952049).

121010220111 is a wasteful number, since it uses less digits than its factorization.

121010220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860566.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 121010220111 its reverse (111022010121), we get a palindrome (232032230232).

The spelling of 121010220111 in words is "one hundred twenty-one billion, ten million, two hundred twenty thousand, one hundred eleven".