121021211120110 has 128 divisors (see below), whose sum is σ = 253084135772160. Its totient is φ = 40810290791424.

The previous prime is 121021211120057. The next prime is 121021211120129. The reversal of 121021211120110 is 11021112120121.

It is a super-2 number, since 2×121021211120110² (a number of 29 digits) contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 11810399007 + ... + 11810409253.

It is an arithmetic number, because the mean of its divisors is an integer number (1977219810720).

Almost surely, 2^{121021211120110} is an apocalyptic number.

121021211120110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121021211120110 is an abundant number, since it is smaller than the sum of its proper divisors (132062924652050).

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

121021211120110 is a wasteful number, since it uses less digits than its factorization.

121021211120110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20170.

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

Adding to 121021211120110 its reverse (11021112120121), we get a palindrome (132042323240231).

It can be divided in two parts, 12102121 and 1120110, that added together give a palindrome (13222231).

The spelling of 121021211120110 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred eleven million, one hundred twenty thousand, one hundred ten".