121211100020110 has 32 divisors (see below), whose sum is σ = 218378075209632. Its totient is φ = 48440434327680.

The previous prime is 121211100020107. The next prime is 121211100020113. The reversal of 121211100020110 is 11020001112121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121211100020107) and next prime (121211100020113).

It is a super-2 number, since 2×121211100020110² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121211100020113) 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, 61906252 + ... + 63834208.

It is an arithmetic number, because the mean of its divisors is an integer number (6824314850301).

Almost surely, 2^{121211100020110} is an apocalyptic number.

121211100020110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211100020110 is a deficient number, since it is larger than the sum of its proper divisors (97166975189522).

121211100020110 is a wasteful number, since it uses less digits than its factorization.

121211100020110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1933668.

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

Adding to 121211100020110 its reverse (11020001112121), we get a palindrome (132231101132231).

The spelling of 121211100020110 in words is "one hundred twenty-one trillion, two hundred eleven billion, one hundred million, twenty thousand, one hundred ten".