1021201231 has 2 divisors, whose sum is σ = 1021201232. Its totient is φ = 1021201230.

The previous prime is 1021201217. The next prime is 1021201241. The reversal of 1021201231 is 1321021201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021201231 is a prime.

It is a super-2 number, since 2×1021201231² = 2085703908391830722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021201201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510600615 + 510600616.

It is an arithmetic number, because the mean of its divisors is an integer number (510600616).

Almost surely, 2^1021201231 is an apocalyptic number.

1021201231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021201231 is an equidigital number, since it uses as much as digits as its factorization.

1021201231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1021201231 is about 31956.2393125349. The cubic root of 1021201231 is about 1007.0177134938.

Adding to 1021201231 its reverse (1321021201), we get a palindrome (2342222432).

The spelling of 1021201231 in words is "one billion, twenty-one million, two hundred one thousand, two hundred thirty-one".