21021200411 has 8 divisors (see below), whose sum is σ = 22129681920. Its totient is φ = 19912929192.

The previous prime is 21021200399. The next prime is 21021200467. The reversal of 21021200411 is 11400212012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021200411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021200311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178766 + ... + 272028.

It is an arithmetic number, because the mean of its divisors is an integer number (2766210240).

Almost surely, 2^21021200411 is an apocalyptic number.

21021200411 is a deficient number, since it is larger than the sum of its proper divisors (1108481509).

21021200411 is a wasteful number, since it uses less digits than its factorization.

21021200411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105145.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21021200411 its reverse (11400212012), we get a palindrome (32421412423).

The spelling of 21021200411 in words is "twenty-one billion, twenty-one million, two hundred thousand, four hundred eleven".