9202002012121 has 4 divisors (see below), whose sum is σ = 9202008161700. Its totient is φ = 9201995862544.

The previous prime is 9202002012109. The next prime is 9202002012127. The reversal of 9202002012121 is 1212102002029.

9202002012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5631432748096 + 3570569264025 = 2373064^2 + 1889595^2 .

It is a cyclic number.

It is not a de Polignac number, because 9202002012121 - 2²¹ = 9201999914969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9202002012092 and 9202002012101.

It is not an unprimeable number, because it can be changed into a prime (9202002012127) 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, 783915 + ... + 4361023.

It is an arithmetic number, because the mean of its divisors is an integer number (2300502040425).

Almost surely, 2^{9202002012121} is an apocalyptic number.

It is an amenable number.

9202002012121 is a deficient number, since it is larger than the sum of its proper divisors (6149579).

9202002012121 is a wasteful number, since it uses less digits than its factorization.

9202002012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149578.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 9202002012121 in words is "nine trillion, two hundred two billion, two million, twelve thousand, one hundred twenty-one".