21333102001 has 24 divisors (see below), whose sum is σ = 23325629400. Its totient is φ = 19441950720.

The previous prime is 21333101983. The next prime is 21333102023. The reversal of 21333102001 is 10020133312.

It can be written as a sum of positive squares in 12 ways, for example, as 14993757601 + 6339344400 = 122449^2 + 79620^2 .

It is not a de Polignac number, because 21333102001 - 2⁷ = 21333101873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333102031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3912325 + ... + 3917773.

It is an arithmetic number, because the mean of its divisors is an integer number (971901225).

Almost surely, 2^21333102001 is an apocalyptic number.

It is an amenable number.

21333102001 is a deficient number, since it is larger than the sum of its proper divisors (1992527399).

21333102001 is a wasteful number, since it uses less digits than its factorization.

21333102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685 (or 5644 counting only the distinct ones).

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

Adding to 21333102001 its reverse (10020133312), we get a palindrome (31353235313).

The spelling of 21333102001 in words is "twenty-one billion, three hundred thirty-three million, one hundred two thousand, one".