7802201020121 has 4 divisors (see below), whose sum is σ = 7802248139700. Its totient is φ = 7802153900544.

The previous prime is 7802201020109. The next prime is 7802201020189. The reversal of 7802201020121 is 1210201022087.

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 2020773128521 + 5781427891600 = 1421539^2 + 2404460^2 .

It is a cyclic number.

It is not a de Polignac number, because 7802201020121 - 2⁴² = 3404154509017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7802201020721) 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, 23310536 + ... + 23642873.

It is an arithmetic number, because the mean of its divisors is an integer number (1950562034925).

Almost surely, 2^{7802201020121} is an apocalyptic number.

It is an amenable number.

7802201020121 is a deficient number, since it is larger than the sum of its proper divisors (47119579).

7802201020121 is a wasteful number, since it uses less digits than its factorization.

7802201020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47119578.

The product of its (nonzero) digits is 896, while the sum is 26.

The spelling of 7802201020121 in words is "seven trillion, eight hundred two billion, two hundred one million, twenty thousand, one hundred twenty-one".