121221222212010 has 64 divisors (see below), whose sum is σ = 291477347441280. Its totient is φ = 32264950129920.

The previous prime is 121221222211967. The next prime is 121221222212017. The reversal of 121221222212010 is 10212222122121.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121221222212017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 672692101 + ... + 672872279.

It is an arithmetic number, because the mean of its divisors is an integer number (4554333553770).

Almost surely, 2^{121221222212010} is an apocalyptic number.

121221222212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221222212010 is an abundant number, since it is smaller than the sum of its proper divisors (170256125229270).

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

121221222212010 is a wasteful number, since it uses less digits than its factorization.

121221222212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222183.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121221222212010 its reverse (10212222122121), we get a palindrome (131433444334131).

The spelling of 121221222212010 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, ten".