1111201021003 has 2 divisors, whose sum is σ = 1111201021004. Its totient is φ = 1111201021002.

The previous prime is 1111201020991. The next prime is 1111201021057. The reversal of 1111201021003 is 3001201021111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111201021003 - 2²⁵ = 1111167466571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111201021103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555600510501 + 555600510502.

It is an arithmetic number, because the mean of its divisors is an integer number (555600510502).

Almost surely, 2^{1111201021003} is an apocalyptic number.

1111201021003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111201021003 is an equidigital number, since it uses as much as digits as its factorization.

1111201021003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1111201021003 its reverse (3001201021111), we get a palindrome (4112402042114).

The spelling of 1111201021003 in words is "one trillion, one hundred eleven billion, two hundred one million, twenty-one thousand, three".