121202101021021 has 4 divisors (see below), whose sum is σ = 122451607217212. Its totient is φ = 119952594824832.

The previous prime is 121202101021003. The next prime is 121202101021033. The reversal of 121202101021021 is 120120101202121.

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 64725162588025 + 56476938432996 = 8045195^2 + 7515114^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202101021021 - 2³⁹ = 120652345207133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121202101020986 and 121202101021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121202101121021) 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, 624753097950 + ... + 624753098143.

It is an arithmetic number, because the mean of its divisors is an integer number (30612901804303).

Almost surely, 2^{121202101021021} is an apocalyptic number.

It is an amenable number.

121202101021021 is a deficient number, since it is larger than the sum of its proper divisors (1249506196191).

121202101021021 is an equidigital number, since it uses as much as digits as its factorization.

121202101021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249506196190.

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

Adding to 121202101021021 its reverse (120120101202121), we get a palindrome (241322202223142).

The spelling of 121202101021021 in words is "one hundred twenty-one trillion, two hundred two billion, one hundred one million, twenty-one thousand, twenty-one".