21001412423711 has 2 divisors, whose sum is σ = 21001412423712. Its totient is φ = 21001412423710.

The previous prime is 21001412423599. The next prime is 21001412423777. The reversal of 21001412423711 is 11732421410012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21001412423711 - 2⁴² = 16603365912607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21001412413711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500706211855 + 10500706211856.

It is an arithmetic number, because the mean of its divisors is an integer number (10500706211856).

Almost surely, 2^{21001412423711} is an apocalyptic number.

21001412423711 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001412423711 is an equidigital number, since it uses as much as digits as its factorization.

21001412423711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 21001412423711 its reverse (11732421410012), we get a palindrome (32733833833723).

The spelling of 21001412423711 in words is "twenty-one trillion, one billion, four hundred twelve million, four hundred twenty-three thousand, seven hundred eleven".