202231121 has 2 divisors, whose sum is σ = 202231122. Its totient is φ = 202231120.

The previous prime is 202231103. The next prime is 202231151. The reversal of 202231121 is 121132202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194881600 + 7349521 = 13960^2 + 2711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202231121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202231096 and 202231105.

It is not a weakly prime, because it can be changed into another prime (202231151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101115560 + 101115561.

It is an arithmetic number, because the mean of its divisors is an integer number (101115561).

Almost surely, 2^202231121 is an apocalyptic number.

It is an amenable number.

202231121 is a deficient number, since it is larger than the sum of its proper divisors (1).

202231121 is an equidigital number, since it uses as much as digits as its factorization.

202231121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 202231121 is about 14220.7988875450. The cubic root of 202231121 is about 586.9701234761.

Adding to 202231121 its reverse (121132202), we get a palindrome (323363323).

The spelling of 202231121 in words is "two hundred two million, two hundred thirty-one thousand, one hundred twenty-one".