21106754101 has 2 divisors, whose sum is σ = 21106754102. Its totient is φ = 21106754100.

The previous prime is 21106754077. The next prime is 21106754113. The reversal of 21106754101 is 10145760112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19147363876 + 1959390225 = 138374^2 + 44265^2 .

It is a cyclic number.

It is not a de Polignac number, because 21106754101 - 2⁵ = 21106754069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21106754101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21106751101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10553377050 + 10553377051.

It is an arithmetic number, because the mean of its divisors is an integer number (10553377051).

Almost surely, 2^21106754101 is an apocalyptic number.

It is an amenable number.

21106754101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21106754101 is an equidigital number, since it uses as much as digits as its factorization.

21106754101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The spelling of 21106754101 in words is "twenty-one billion, one hundred six million, seven hundred fifty-four thousand, one hundred one".