1225331011 has 2 divisors, whose sum is σ = 1225331012. Its totient is φ = 1225331010.

The previous prime is 1225330987. The next prime is 1225331027. The reversal of 1225331011 is 1101335221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1225331011 - 2¹⁷ = 1225199939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1225331011.

It is not a weakly prime, because it can be changed into another prime (1225331111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612665505 + 612665506.

It is an arithmetic number, because the mean of its divisors is an integer number (612665506).

Almost surely, 2^1225331011 is an apocalyptic number.

1225331011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225331011 is an equidigital number, since it uses as much as digits as its factorization.

1225331011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1225331011 is about 35004.7284091735. The cubic root of 1225331011 is about 1070.0838467500.

Adding to 1225331011 its reverse (1101335221), we get a palindrome (2326666232).

It can be divided in two parts, 12253 and 31011, that added together give a square (43264 = 208²).

The spelling of 1225331011 in words is "one billion, two hundred twenty-five million, three hundred thirty-one thousand, eleven".