21011233130201 has 4 divisors (see below), whose sum is σ = 21011243138832. Its totient is φ = 21011223121572.

The previous prime is 21011233130183. The next prime is 21011233130243. The reversal of 21011233130201 is 10203133211012.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21011233130201 - 2⁶ = 21011233130137 is a prime.

It is a super-2 number, since 2×21011233130201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21011233100201) 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, 509795 + ... + 6502488.

It is an arithmetic number, because the mean of its divisors is an integer number (5252810784708).

Almost surely, 2^{21011233130201} is an apocalyptic number.

It is an amenable number.

21011233130201 is a deficient number, since it is larger than the sum of its proper divisors (10008631).

21011233130201 is an equidigital number, since it uses as much as digits as its factorization.

21011233130201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10008630.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21011233130201 its reverse (10203133211012), we get a palindrome (31214366341213).

The spelling of 21011233130201 in words is "twenty-one trillion, eleven billion, two hundred thirty-three million, one hundred thirty thousand, two hundred one".