121221202102010 has 8 divisors (see below), whose sum is σ = 218198163783636. Its totient is φ = 48488480840800.

The previous prime is 121221202101977. The next prime is 121221202102027. The reversal of 121221202102010 is 10201202122121.

It can be written as a sum of positive squares in 2 ways, for example, as 115168504892281 + 6052697209729 = 10731659^2 + 2460223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121221202102010.

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, 6061060105091 + ... + 6061060105110.

Almost surely, 2^{121221202102010} is an apocalyptic number.

121221202102010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221202102010 is a deficient number, since it is larger than the sum of its proper divisors (96976961681626).

121221202102010 is a wasteful number, since it uses less digits than its factorization.

121221202102010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12122120210208.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121221202102010 its reverse (10201202122121), we get a palindrome (131422404224131).

The spelling of 121221202102010 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred two thousand, ten".