121111210210 has 8 divisors (see below), whose sum is σ = 218000178396. Its totient is φ = 48444484080.

The previous prime is 121111210177. The next prime is 121111210217. The reversal of 121111210210 is 12012111121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 120466608889 + 644601321 = 347083^2 + 25389^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (121111210217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6055560501 + ... + 6055560520.

Almost surely, 2^121111210210 is an apocalyptic number.

121111210210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121111210210 is a deficient number, since it is larger than the sum of its proper divisors (96888968186).

121111210210 is a wasteful number, since it uses less digits than its factorization.

121111210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12111121028.

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

Adding to 121111210210 its reverse (12012111121), we get a palindrome (133123321331).

The spelling of 121111210210 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred ten thousand, two hundred ten".