21122000101 has 2 divisors, whose sum is σ = 21122000102. Its totient is φ = 21122000100.

The previous prime is 21122000083. The next prime is 21122000143. The reversal of 21122000101 is 10100022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16282015201 + 4839984900 = 127601^2 + 69570^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122000101 - 2⁹ = 21121999589 is a prime.

It is a super-2 number, since 2×21122000101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122000401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561000050 + 10561000051.

It is an arithmetic number, because the mean of its divisors is an integer number (10561000051).

Almost surely, 2^21122000101 is an apocalyptic number.

It is an amenable number.

21122000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122000101 is an equidigital number, since it uses as much as digits as its factorization.

21122000101 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 10.

Adding to 21122000101 its reverse (10100022112), we get a palindrome (31222022213).

The spelling of 21122000101 in words is "twenty-one billion, one hundred twenty-two million, one hundred one", and thus it is an aban number.