121120212012210 has 56 divisors (see below), whose sum is σ = 326875041326700. Its totient is φ = 32298723201312.

The previous prime is 121120212012157. The next prime is 121120212012211. The reversal of 121120212012210 is 12210212021121.

121120212012210 is a `hidden beast` number, since 1 + 211 + 20 + 21 + 201 + 2 + 210 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 101905814815281 + 19214397196929 = 10094841^2 + 4383423^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121120212012211) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8307277485 + ... + 8307292064.

Almost surely, 2^{121120212012210} is an apocalyptic number.

121120212012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121120212012210 is an abundant number, since it is smaller than the sum of its proper divisors (205754829314490).

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

121120212012210 is an equidigital number, since it uses as much as digits as its factorization.

121120212012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16614569574 (or 16614569559 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121120212012210 its reverse (12210212021121), we get a palindrome (133330424033331).

The spelling of 121120212012210 in words is "one hundred twenty-one trillion, one hundred twenty billion, two hundred twelve million, twelve thousand, two hundred ten".