21012211001011 has 2 divisors, whose sum is σ = 21012211001012. Its totient is φ = 21012211001010.

The previous prime is 21012211000973. The next prime is 21012211001039. The reversal of 21012211001011 is 11010011221012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21012211001011 - 2⁹ = 21012211000499 is a prime.

It is a super-2 number, since 2×21012211001011² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21012211000982 and 21012211001000.

It is not a weakly prime, because it can be changed into another prime (21012217001011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506105500505 + 10506105500506.

It is an arithmetic number, because the mean of its divisors is an integer number (10506105500506).

Almost surely, 2^{21012211001011} is an apocalyptic number.

21012211001011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012211001011 is an equidigital number, since it uses as much as digits as its factorization.

21012211001011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21012211001011 its reverse (11010011221012), we get a palindrome (32022222222023).

The spelling of 21012211001011 in words is "twenty-one trillion, twelve billion, two hundred eleven million, one thousand, eleven".