121221210111202 has 12 divisors (see below), whose sum is σ = 193156980126210. Its totient is φ = 57045275346176.

The previous prime is 121221210111137. The next prime is 121221210111233. The reversal of 121221210111202 is 202111012122121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 113360078290761 + 7861131820441 = 10647069^2 + 2803771^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121221210111202.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 104862637927 + ... + 104862639082.

Almost surely, 2^{121221210111202} is an apocalyptic number.

121221210111202 is a deficient number, since it is larger than the sum of its proper divisors (71935770015008).

121221210111202 is a wasteful number, since it uses less digits than its factorization.

121221210111202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209725277045 (or 209725277028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121221210111202 its reverse (202111012122121), we get a palindrome (323332222233323).

The spelling of 121221210111202 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred ten million, one hundred eleven thousand, two hundred two".