21202120001011 has 2 divisors, whose sum is σ = 21202120001012. Its totient is φ = 21202120001010.

The previous prime is 21202120000979. The next prime is 21202120001033. The reversal of 21202120001011 is 11010002120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202120001011 - 2⁵ = 21202120000979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21202120000982 and 21202120001000.

It is not a weakly prime, because it can be changed into another prime (21202120001081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601060000505 + 10601060000506.

It is an arithmetic number, because the mean of its divisors is an integer number (10601060000506).

Almost surely, 2^{21202120001011} is an apocalyptic number.

21202120001011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202120001011 is an equidigital number, since it uses as much as digits as its factorization.

21202120001011 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 13.

Adding to 21202120001011 its reverse (11010002120212), we get a palindrome (32212122121223).

The spelling of 21202120001011 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, one thousand, eleven".