21030091201 has 4 divisors (see below), whose sum is σ = 24034389952. Its totient is φ = 18025792452.

The previous prime is 21030091139. The next prime is 21030091223. The reversal of 21030091201 is 10219003012.

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 21030091201 - 2¹¹ = 21030089153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030091231) 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, 1502149365 + ... + 1502149378.

It is an arithmetic number, because the mean of its divisors is an integer number (6008597488).

Almost surely, 2^21030091201 is an apocalyptic number.

It is an amenable number.

21030091201 is a deficient number, since it is larger than the sum of its proper divisors (3004298751).

21030091201 is an equidigital number, since it uses as much as digits as its factorization.

21030091201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3004298750.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21030091201 its reverse (10219003012), we get a palindrome (31249094213).

The spelling of 21030091201 in words is "twenty-one billion, thirty million, ninety-one thousand, two hundred one".