21001433101 has 16 divisors (see below), whose sum is σ = 23943237120. Its totient is φ = 18234259120.

The previous prime is 21001433083. The next prime is 21001433161. The reversal of 21001433101 is 10133410012.

It is not a de Polignac number, because 21001433101 - 2⁵ = 21001433069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001433161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103746 + ... + 229708.

It is an arithmetic number, because the mean of its divisors is an integer number (1496452320).

Almost surely, 2^21001433101 is an apocalyptic number.

It is an amenable number.

21001433101 is a deficient number, since it is larger than the sum of its proper divisors (2941804019).

21001433101 is a wasteful number, since it uses less digits than its factorization.

21001433101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126656.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21001433101 its reverse (10133410012), we get a palindrome (31134843113).

The spelling of 21001433101 in words is "twenty-one billion, one million, four hundred thirty-three thousand, one hundred one".