121302020002121 has 16 divisors (see below), whose sum is σ = 139433722301184. Its totient is φ = 103371041277504.

The previous prime is 121302020002099. The next prime is 121302020002159. The reversal of 121302020002121 is 121200020203121.

It is not a de Polignac number, because 121302020002121 - 2¹⁴ = 121302019985737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121302020002121.

It is not an unprimeable number, because it can be changed into a prime (121302020002181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123156215 + ... + 124137251.

It is an arithmetic number, because the mean of its divisors is an integer number (8714607643824).

Almost surely, 2^{121302020002121} is an apocalyptic number.

It is an amenable number.

121302020002121 is a deficient number, since it is larger than the sum of its proper divisors (18131702299063).

121302020002121 is a wasteful number, since it uses less digits than its factorization.

121302020002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083320.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121302020002121 its reverse (121200020203121), we get a palindrome (242502040205242).

The spelling of 121302020002121 in words is "one hundred twenty-one trillion, three hundred two billion, twenty million, two thousand, one hundred twenty-one".