21210133301 has 4 divisors (see below), whose sum is σ = 24240152352. Its totient is φ = 18180114252.

The previous prime is 21210133291. The next prime is 21210133369. The reversal of 21210133301 is 10333101212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21210133301 - 2⁶ = 21210133237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210133301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210136301) 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, 1515009515 + ... + 1515009528.

It is an arithmetic number, because the mean of its divisors is an integer number (6060038088).

Almost surely, 2^21210133301 is an apocalyptic number.

It is an amenable number.

21210133301 is a deficient number, since it is larger than the sum of its proper divisors (3030019051).

21210133301 is an equidigital number, since it uses as much as digits as its factorization.

21210133301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030019050.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21210133301 its reverse (10333101212), we get a palindrome (31543234513).

The spelling of 21210133301 in words is "twenty-one billion, two hundred ten million, one hundred thirty-three thousand, three hundred one".