21201414211 has 2 divisors, whose sum is σ = 21201414212. Its totient is φ = 21201414210.

The previous prime is 21201414181. The next prime is 21201414217. The reversal of 21201414211 is 11241410212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201414211 - 2²³ = 21193025603 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201414217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600707105 + 10600707106.

It is an arithmetic number, because the mean of its divisors is an integer number (10600707106).

Almost surely, 2^21201414211 is an apocalyptic number.

21201414211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201414211 is an equidigital number, since it uses as much as digits as its factorization.

21201414211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21201414211 its reverse (11241410212), we get a palindrome (32442824423).

The spelling of 21201414211 in words is "twenty-one billion, two hundred one million, four hundred fourteen thousand, two hundred eleven".