121212200302100 has 36 divisors (see below), whose sum is σ = 272100491029500. Its totient is φ = 46812987701760.

The previous prime is 121212200302091. The next prime is 121212200302157. The reversal of 121212200302100 is 1203002212121.

It can be written as a sum of positive squares in 6 ways, for example, as 942507005584 + 120269693296516 = 970828^2 + 10966754^2 .

It is a super-2 number, since 2×121212200302100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20898652325 + ... + 20898658124.

Almost surely, 2^{121212200302100} is an apocalyptic number.

121212200302100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212200302100 is an abundant number, since it is smaller than the sum of its proper divisors (150888290727400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121212200302100 is a wasteful number, since it uses less digits than its factorization.

121212200302100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41797310492 (or 41797310485 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121212200302100 its reverse (1203002212121), we get a palindrome (122415202514221).

The spelling of 121212200302100 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred million, three hundred two thousand, one hundred".