121121210121110 has 24 divisors (see below), whose sum is σ = 230096747655216. Its totient is φ = 45898563834000.

The previous prime is 121121210121101. The next prime is 121121210121151. The reversal of 121121210121110 is 11121012121121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16775787266 + ... + 16775794485.

It is an arithmetic number, because the mean of its divisors is an integer number (9587364485634).

Almost surely, 2^{121121210121110} is an apocalyptic number.

121121210121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121210121110 is a deficient number, since it is larger than the sum of its proper divisors (108975537534106).

121121210121110 is a wasteful number, since it uses less digits than its factorization.

121121210121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33551581796 (or 33551581777 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121121210121110 its reverse (11121012121121), we get a palindrome (132242222242231).

The spelling of 121121210121110 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, one hundred ten".