121012102010221 has 4 divisors (see below), whose sum is σ = 121019888661244. Its totient is φ = 121004315359200.

The previous prime is 121012102010197. The next prime is 121012102010281. The reversal of 121012102010221 is 122010201210121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63770605922500 + 57241496087721 = 7985650^2 + 7565811^2 .

It is a cyclic number.

It is not a de Polignac number, because 121012102010221 - 2²³ = 121012093621613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121012102010195 and 121012102010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012102010281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3893302200 + ... + 3893333281.

It is an arithmetic number, because the mean of its divisors is an integer number (30254972165311).

Almost surely, 2^{121012102010221} is an apocalyptic number.

It is an amenable number.

121012102010221 is a deficient number, since it is larger than the sum of its proper divisors (7786651023).

121012102010221 is an equidigital number, since it uses as much as digits as its factorization.

121012102010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786651022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121012102010221 its reverse (122010201210121), we get a palindrome (243022303220342).

The spelling of 121012102010221 in words is "one hundred twenty-one trillion, twelve billion, one hundred two million, ten thousand, two hundred twenty-one".