1221101201003 has 2 divisors, whose sum is σ = 1221101201004. Its totient is φ = 1221101201002.

The previous prime is 1221101200981. The next prime is 1221101201009. The reversal of 1221101201003 is 3001021011221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221101201003 - 2⁸ = 1221101200747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1221101201009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610550600501 + 610550600502.

It is an arithmetic number, because the mean of its divisors is an integer number (610550600502).

Almost surely, 2^{1221101201003} is an apocalyptic number.

1221101201003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221101201003 is an equidigital number, since it uses as much as digits as its factorization.

1221101201003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1221101201003 its reverse (3001021011221), we get a palindrome (4222122212224).

The spelling of 1221101201003 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two hundred one thousand, three".