121111011210 has 96 divisors (see below), whose sum is σ = 358011783360. Its totient is φ = 26054128128.

The previous prime is 121111011209. The next prime is 121111011251. The reversal of 121111011210 is 12110111121.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2398200 + ... + 2448179.

It is an arithmetic number, because the mean of its divisors is an integer number (3729289410).

Almost surely, 2^121111011210 is an apocalyptic number.

121111011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111011210 is an abundant number, since it is smaller than the sum of its proper divisors (236900772150).

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

121111011210 is a wasteful number, since it uses less digits than its factorization.

121111011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846420 (or 4846413 counting only the distinct ones).

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

Adding to 121111011210 its reverse (12110111121), we get a palindrome (133221122331).

The spelling of 121111011210 in words is "one hundred twenty-one billion, one hundred eleven million, eleven thousand, two hundred ten".