121221202102012 has 12 divisors (see below), whose sum is σ = 214822383472480. Its totient is φ = 59843378252736.

The previous prime is 121221202101977. The next prime is 121221202102027. The reversal of 121221202102012 is 210201202122121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191805699213 + ... + 191805699844.

Almost surely, 2^{121221202102012} is an apocalyptic number.

It is an amenable number.

121221202102012 is a deficient number, since it is larger than the sum of its proper divisors (93601181370468).

121221202102012 is a wasteful number, since it uses less digits than its factorization.

121221202102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383611399140 (or 383611399138 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121221202102012 its reverse (210201202122121), we get a palindrome (331422404224133).

The spelling of 121221202102012 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred two thousand, twelve".