21122070020111 has 2 divisors, whose sum is σ = 21122070020112. Its totient is φ = 21122070020110.

The previous prime is 21122070020099. The next prime is 21122070020119. The reversal of 21122070020111 is 11102007022112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122070020111 is a prime.

It is a super-2 number, since 2×21122070020111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122070020119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561035010055 + 10561035010056.

It is an arithmetic number, because the mean of its divisors is an integer number (10561035010056).

Almost surely, 2^{21122070020111} is an apocalyptic number.

21122070020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122070020111 is an equidigital number, since it uses as much as digits as its factorization.

21122070020111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 21122070020111 its reverse (11102007022112), we get a palindrome (32224077042223).

The spelling of 21122070020111 in words is "twenty-one trillion, one hundred twenty-two billion, seventy million, twenty thousand, one hundred eleven".