21103033001 has 4 divisors (see below), whose sum is σ = 21107999172. Its totient is φ = 21098066832.

The previous prime is 21103032983. The next prime is 21103033087. The reversal of 21103033001 is 10033030112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11061990976 + 10041042025 = 105176^2 + 100205^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103033001 - 2¹⁴ = 21103016617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103030001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2476706 + ... + 2485211.

It is an arithmetic number, because the mean of its divisors is an integer number (5276999793).

Almost surely, 2^21103033001 is an apocalyptic number.

It is an amenable number.

21103033001 is a deficient number, since it is larger than the sum of its proper divisors (4966171).

21103033001 is an equidigital number, since it uses as much as digits as its factorization.

21103033001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966170.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21103033001 its reverse (10033030112), we get a palindrome (31136063113).

The spelling of 21103033001 in words is "twenty-one billion, one hundred three million, thirty-three thousand, one".