21273575111 has 2 divisors, whose sum is σ = 21273575112. Its totient is φ = 21273575110.

The previous prime is 21273575083. The next prime is 21273575143. The reversal of 21273575111 is 11157537212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21273575111 - 2²² = 21269380807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21273577111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10636787555 + 10636787556.

It is an arithmetic number, because the mean of its divisors is an integer number (10636787556).

Almost surely, 2^21273575111 is an apocalyptic number.

21273575111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21273575111 is an equidigital number, since it uses as much as digits as its factorization.

21273575111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14700, while the sum is 35.

The spelling of 21273575111 in words is "twenty-one billion, two hundred seventy-three million, five hundred seventy-five thousand, one hundred eleven".