121121210110 has 48 divisors (see below), whose sum is σ = 235261595520. Its totient is φ = 44847063360.

The previous prime is 121121210101. The next prime is 121121210123. The reversal of 121121210110 is 11012121121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205305 + ... + 533284.

It is an arithmetic number, because the mean of its divisors is an integer number (4901283240).

Almost surely, 2^121121210110 is an apocalyptic number.

121121210110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121210110 is a deficient number, since it is larger than the sum of its proper divisors (114140385410).

121121210110 is a wasteful number, since it uses less digits than its factorization.

121121210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738673 (or 738650 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121121210110 its reverse (11012121121), we get a palindrome (132133331231).

The spelling of 121121210110 in words is "one hundred twenty-one billion, one hundred twenty-one million, two hundred ten thousand, one hundred ten".