850231121 has 2 divisors, whose sum is σ = 850231122. Its totient is φ = 850231120.

The previous prime is 850231099. The next prime is 850231127. The reversal of 850231121 is 121132058.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 844774225 + 5456896 = 29065^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 850231121 - 2¹⁰ = 850230097 is a prime.

It is not a weakly prime, because it can be changed into another prime (850231127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425115560 + 425115561.

It is an arithmetic number, because the mean of its divisors is an integer number (425115561).

Almost surely, 2^850231121 is an apocalyptic number.

It is an amenable number.

850231121 is a deficient number, since it is larger than the sum of its proper divisors (1).

850231121 is an equidigital number, since it uses as much as digits as its factorization.

850231121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 850231121 is about 29158.7228972738. The cubic root of 850231121 is about 947.3540857122.

Adding to 850231121 its reverse (121132058), we get a palindrome (971363179).

The spelling of 850231121 in words is "eight hundred fifty million, two hundred thirty-one thousand, one hundred twenty-one".