21612105062329 has 2 divisors, whose sum is σ = 21612105062330. Its totient is φ = 21612105062328.

The previous prime is 21612105062281. The next prime is 21612105062381. The reversal of 21612105062329 is 92326050121612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14078644631104 + 7533460431225 = 3752152^2 + 2744715^2 .

It is a cyclic number.

It is not a de Polignac number, because 21612105062329 - 2⁴¹ = 19413081806777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21612105062291 and 21612105062300.

It is not a weakly prime, because it can be changed into another prime (21612105072329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10806052531164 + 10806052531165.

It is an arithmetic number, because the mean of its divisors is an integer number (10806052531165).

Almost surely, 2^{21612105062329} is an apocalyptic number.

It is an amenable number.

21612105062329 is a deficient number, since it is larger than the sum of its proper divisors (1).

21612105062329 is an equidigital number, since it uses as much as digits as its factorization.

21612105062329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 21612105062329 in words is "twenty-one trillion, six hundred twelve billion, one hundred five million, sixty-two thousand, three hundred twenty-nine".