21200000022011 has 2 divisors, whose sum is σ = 21200000022012. Its totient is φ = 21200000022010.

The previous prime is 21200000021953. The next prime is 21200000022031. The reversal of 21200000022011 is 11022000000212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200000022011 - 2¹⁴ = 21200000005627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21200000021983 and 21200000022001.

It is not a weakly prime, because it can be changed into another prime (21200000022031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600000011005 + 10600000011006.

It is an arithmetic number, because the mean of its divisors is an integer number (10600000011006).

Almost surely, 2^{21200000022011} is an apocalyptic number.

21200000022011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200000022011 is an equidigital number, since it uses as much as digits as its factorization.

21200000022011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21200000022011 its reverse (11022000000212), we get a palindrome (32222000022223).

The spelling of 21200000022011 in words is "twenty-one trillion, two hundred billion, twenty-two thousand, eleven".