21352052001 has 64 divisors (see below), whose sum is σ = 35177103360. Its totient is φ = 11252070720.

The previous prime is 21352051997. The next prime is 21352052023. The reversal of 21352052001 is 10025025312.

It is not a de Polignac number, because 21352052001 - 2² = 21352051997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21352052041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4234840 + ... + 4239878.

It is an arithmetic number, because the mean of its divisors is an integer number (549642240).

Almost surely, 2^21352052001 is an apocalyptic number.

21352052001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21352052001 is a deficient number, since it is larger than the sum of its proper divisors (13825051359).

21352052001 is a wasteful number, since it uses less digits than its factorization.

21352052001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5386.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 21352052001 its reverse (10025025312), we get a palindrome (31377077313).

The spelling of 21352052001 in words is "twenty-one billion, three hundred fifty-two million, fifty-two thousand, one".