1021221203 has 2 divisors, whose sum is σ = 1021221204. Its totient is φ = 1021221202.

The previous prime is 1021221197. The next prime is 1021221239. The reversal of 1021221203 is 3021221201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1021221203 - 2¹⁴ = 1021204819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021224203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610601 + 510610602.

It is an arithmetic number, because the mean of its divisors is an integer number (510610602).

Almost surely, 2^1021221203 is an apocalyptic number.

1021221203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021221203 is an equidigital number, since it uses as much as digits as its factorization.

1021221203 is an evil number, because the sum of its binary digits is even.

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

The square root of 1021221203 is about 31956.5518008436. The cubic root of 1021221203 is about 1007.0242783203.

Adding to 1021221203 its reverse (3021221201), we get a palindrome (4042442404).

The spelling of 1021221203 in words is "one billion, twenty-one million, two hundred twenty-one thousand, two hundred three".