121210202110110 has 128 divisors (see below), whose sum is σ = 308672589335040. Its totient is φ = 30356636749824.

The previous prime is 121210202110103. The next prime is 121210202110133. The reversal of 121210202110110 is 11011202012121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 121210202110110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 625152361 + ... + 625346219.

It is an arithmetic number, because the mean of its divisors is an integer number (2411504604180).

Almost surely, 2^{121210202110110} is an apocalyptic number.

121210202110110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121210202110110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154336294667520).

121210202110110 is an abundant number, since it is smaller than the sum of its proper divisors (187462387224930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121210202110110 is a wasteful number, since it uses less digits than its factorization.

121210202110110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196490.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121210202110110 its reverse (11011202012121), we get a palindrome (132221404122231).

The spelling of 121210202110110 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred two million, one hundred ten thousand, one hundred ten".