21113012222101 has 2 divisors, whose sum is σ = 21113012222102. Its totient is φ = 21113012222100.

The previous prime is 21113012222023. The next prime is 21113012222117. The reversal of 21113012222101 is 10122221031112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12524308660900 + 8588703561201 = 3538970^2 + 2930649^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113012222101 - 2¹⁷ = 21113012091029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113012222131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556506111050 + 10556506111051.

It is an arithmetic number, because the mean of its divisors is an integer number (10556506111051).

Almost surely, 2^{21113012222101} is an apocalyptic number.

It is an amenable number.

21113012222101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113012222101 is an equidigital number, since it uses as much as digits as its factorization.

21113012222101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21113012222101 its reverse (10122221031112), we get a palindrome (31235233253213).

The spelling of 21113012222101 in words is "twenty-one trillion, one hundred thirteen billion, twelve million, two hundred twenty-two thousand, one hundred one".