121221202101202 has 12 divisors (see below), whose sum is σ = 211518628156350. Its totient is φ = 51951943757616.

The previous prime is 121221202101161. The next prime is 121221202101283. The reversal of 121221202101202 is 202101202122121.

It can be written as a sum of positive squares in only one way, i.e., 117135835430761 + 4085366670441 = 10822931^2 + 2021229^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121221202101202.

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, 618475520827 + ... + 618475521022.

Almost surely, 2^{121221202101202} is an apocalyptic number.

121221202101202 is a deficient number, since it is larger than the sum of its proper divisors (90297426055148).

121221202101202 is a wasteful number, since it uses less digits than its factorization.

121221202101202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236951041865 (or 1236951041858 counting only the distinct ones).

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

Adding to 121221202101202 its reverse (202101202122121), we get a palindrome (323322404223323).

The spelling of 121221202101202 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred one thousand, two hundred two".