21323334501 has 12 divisors (see below), whose sum is σ = 35200425312. Its totient is φ = 12184762536.

The previous prime is 21323334499. The next prime is 21323334503. The reversal of 21323334501 is 10543332312.

21323334501 is a `hidden beast` number, since 2 + 1 + 323 + 334 + 5 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21323334499) and next prime (21323334503).

It is not a de Polignac number, because 21323334501 - 2¹ = 21323334499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323334503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169232751 + ... + 169232876.

It is an arithmetic number, because the mean of its divisors is an integer number (2933368776).

Almost surely, 2^21323334501 is an apocalyptic number.

21323334501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21323334501 is a deficient number, since it is larger than the sum of its proper divisors (13877090811).

21323334501 is a wasteful number, since it uses less digits than its factorization.

21323334501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338465640 (or 338465637 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 21323334501 its reverse (10543332312), we get a palindrome (31866666813).

The spelling of 21323334501 in words is "twenty-one billion, three hundred twenty-three million, three hundred thirty-four thousand, five hundred one".