1221140303 has 2 divisors, whose sum is σ = 1221140304. Its totient is φ = 1221140302.

The previous prime is 1221140233. The next prime is 1221140339. The reversal of 1221140303 is 3030411221.

It is a strong prime.

It is an emirp because it is prime and its reverse (3030411221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1221140303 - 2¹² = 1221136207 is a prime.

It is a super-3 number, since 3×1221140303³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221148303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610570151 + 610570152.

It is an arithmetic number, because the mean of its divisors is an integer number (610570152).

Almost surely, 2^1221140303 is an apocalyptic number.

1221140303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221140303 is an equidigital number, since it uses as much as digits as its factorization.

1221140303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1221140303 is about 34944.8179706233. The cubic root of 1221140303 is about 1068.8625356780.

Adding to 1221140303 its reverse (3030411221), we get a palindrome (4251551524).

The spelling of 1221140303 in words is "one billion, two hundred twenty-one million, one hundred forty thousand, three hundred three".