21133021003 has 2 divisors, whose sum is σ = 21133021004. Its totient is φ = 21133021002.

The previous prime is 21133020947. The next prime is 21133021009. The reversal of 21133021003 is 30012033112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21133021003 - 2¹³ = 21133012811 is a prime.

It is not a weakly prime, because it can be changed into another prime (21133021009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566510501 + 10566510502.

It is an arithmetic number, because the mean of its divisors is an integer number (10566510502).

Almost surely, 2^21133021003 is an apocalyptic number.

21133021003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21133021003 is an equidigital number, since it uses as much as digits as its factorization.

21133021003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21133021003 its reverse (30012033112), we get a palindrome (51145054115).

The spelling of 21133021003 in words is "twenty-one billion, one hundred thirty-three million, twenty-one thousand, three".