121212210100210 has 8 divisors (see below), whose sum is σ = 218181978180396. Its totient is φ = 48484884040080.

The previous prime is 121212210100193. The next prime is 121212210100253. The reversal of 121212210100210 is 12001012212121.

It can be written as a sum of positive squares in 2 ways, for example, as 99795964182849 + 21416245917361 = 9989793^2 + 4627769^2 .

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

It is a super-2 number, since 2×121212210100210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6060610505001 + ... + 6060610505020.

Almost surely, 2^{121212210100210} is an apocalyptic number.

121212210100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121212210100210 is a deficient number, since it is larger than the sum of its proper divisors (96969768080186).

121212210100210 is a wasteful number, since it uses less digits than its factorization.

121212210100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12121221010028.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121212210100210 its reverse (12001012212121), we get a palindrome (133213222312331).

The spelling of 121212210100210 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred ten million, one hundred thousand, two hundred ten".