121121111010 has 16 divisors (see below), whose sum is σ = 290690666496. Its totient is φ = 32298962928.

The previous prime is 121121110969. The next prime is 121121111047. The reversal of 121121111010 is 10111121121.

121121111010 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2018685154 + ... + 2018685213.

It is an arithmetic number, because the mean of its divisors is an integer number (18168166656).

Almost surely, 2^121121111010 is an apocalyptic number.

121121111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121111010 is an abundant number, since it is smaller than the sum of its proper divisors (169569555486).

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

121121111010 is a wasteful number, since it uses less digits than its factorization.

121121111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037370377.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 121121111010 its reverse (10111121121), we get a palindrome (131232232131).

It can be divided in two parts, 1211211 and 11010, that added together give a palindrome (1222221).

The spelling of 121121111010 in words is "one hundred twenty-one billion, one hundred twenty-one million, one hundred eleven thousand, ten".