21400302011 has 4 divisors (see below), whose sum is σ = 23345784024. Its totient is φ = 19454820000.

The previous prime is 21400301983. The next prime is 21400302023. The reversal of 21400302011 is 11020300412.

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

It is a de Polignac number, because none of the positive numbers 2^k-21400302011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21400302611) 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, 972740990 + ... + 972741011.

It is an arithmetic number, because the mean of its divisors is an integer number (5836446006).

Almost surely, 2^21400302011 is an apocalyptic number.

21400302011 is a deficient number, since it is larger than the sum of its proper divisors (1945482013).

21400302011 is a wasteful number, since it uses less digits than its factorization.

21400302011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945482012.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21400302011 its reverse (11020300412), we get a palindrome (32420602423).

The spelling of 21400302011 in words is "twenty-one billion, four hundred million, three hundred two thousand, eleven".