121211021111210 has 8 divisors (see below), whose sum is σ = 218179838000196. Its totient is φ = 48484408444480.

The previous prime is 121211021111183. The next prime is 121211021111227. The reversal of 121211021111210 is 12111120112121.

It can be written as a sum of positive squares in 2 ways, for example, as 103925607860881 + 17285413250329 = 10194391^2 + 4157573^2 .

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

It is a super-2 number, since 2×121211021111210² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6060551055551 + ... + 6060551055570.

Almost surely, 2^{121211021111210} is an apocalyptic number.

121211021111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121211021111210 is a deficient number, since it is larger than the sum of its proper divisors (96968816888986).

121211021111210 is a wasteful number, since it uses less digits than its factorization.

121211021111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12121102111128.

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

Adding to 121211021111210 its reverse (12111120112121), we get a palindrome (133322141223331).

The spelling of 121211021111210 in words is "one hundred twenty-one trillion, two hundred eleven billion, twenty-one million, one hundred eleven thousand, two hundred ten".