21111014232101 has 2 divisors, whose sum is σ = 21111014232102. Its totient is φ = 21111014232100.

The previous prime is 21111014232089. The next prime is 21111014232169. The reversal of 21111014232101 is 10123241011112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17720816352100 + 3390197880001 = 4209610^2 + 1841249^2 .

It is a cyclic number.

It is not a de Polignac number, because 21111014232101 - 2¹⁸ = 21111013969957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21111014232181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555507116050 + 10555507116051.

It is an arithmetic number, because the mean of its divisors is an integer number (10555507116051).

Almost surely, 2^{21111014232101} is an apocalyptic number.

It is an amenable number.

21111014232101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111014232101 is an equidigital number, since it uses as much as digits as its factorization.

21111014232101 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 20.

Adding to 21111014232101 its reverse (10123241011112), we get a palindrome (31234255243213).

The spelling of 21111014232101 in words is "twenty-one trillion, one hundred eleven billion, fourteen million, two hundred thirty-two thousand, one hundred one".