21120213132101 has 2 divisors, whose sum is σ = 21120213132102. Its totient is φ = 21120213132100.

The previous prime is 21120213132089. The next prime is 21120213132107. The reversal of 21120213132101 is 10123131202112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14695377237025 + 6424835895076 = 3833455^2 + 2534726^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120213132101 - 2³⁰ = 21119139390277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120213132107) 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, 10560106566050 + 10560106566051.

It is an arithmetic number, because the mean of its divisors is an integer number (10560106566051).

Almost surely, 2^{21120213132101} is an apocalyptic number.

It is an amenable number.

21120213132101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120213132101 is an equidigital number, since it uses as much as digits as its factorization.

21120213132101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21120213132101 its reverse (10123131202112), we get a palindrome (31243344334213).

The spelling of 21120213132101 in words is "twenty-one trillion, one hundred twenty billion, two hundred thirteen million, one hundred thirty-two thousand, one hundred one".