1203022001221 has 2 divisors, whose sum is σ = 1203022001222. Its totient is φ = 1203022001220.

The previous prime is 1203022001171. The next prime is 1203022001231. The reversal of 1203022001221 is 1221002203021.

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., 1074983270596 + 128038730625 = 1036814^2 + 357825^2 .

It is an emirp because it is prime and its reverse (1221002203021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203022001221 - 2¹⁵ = 1203021968453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1203022001195 and 1203022001204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203022001231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601511000610 + 601511000611.

It is an arithmetic number, because the mean of its divisors is an integer number (601511000611).

Almost surely, 2^{1203022001221} is an apocalyptic number.

It is an amenable number.

1203022001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203022001221 is an equidigital number, since it uses as much as digits as its factorization.

1203022001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1203022001221 its reverse (1221002203021), we get a palindrome (2424024204242).

The spelling of 1203022001221 in words is "one trillion, two hundred three billion, twenty-two million, one thousand, two hundred twenty-one".