21132002011 has 4 divisors (see below), whose sum is σ = 21132328312. Its totient is φ = 21131675712.

The previous prime is 21132002009. The next prime is 21132002041. The reversal of 21132002011 is 11020023112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21132002011 - 2¹ = 21132002009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21132001982 and 21132002000.

It is not an unprimeable number, because it can be changed into a prime (21132002041) 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, 29526 + ... + 207691.

It is an arithmetic number, because the mean of its divisors is an integer number (5283082078).

Almost surely, 2^21132002011 is an apocalyptic number.

21132002011 is a deficient number, since it is larger than the sum of its proper divisors (326301).

21132002011 is an equidigital number, since it uses as much as digits as its factorization.

21132002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326300.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21132002011 its reverse (11020023112), we get a palindrome (32152025123).

The spelling of 21132002011 in words is "twenty-one billion, one hundred thirty-two million, two thousand, eleven".