21210231095 has 4 divisors (see below), whose sum is σ = 25452277320. Its totient is φ = 16968184872.

The previous prime is 21210231089. The next prime is 21210231121. The reversal of 21210231095 is 59013201212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21210231095 - 2²² = 21206036791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2121023105 + ... + 2121023114.

It is an arithmetic number, because the mean of its divisors is an integer number (6363069330).

Almost surely, 2^21210231095 is an apocalyptic number.

21210231095 is a deficient number, since it is larger than the sum of its proper divisors (4242046225).

21210231095 is an equidigital number, since it uses as much as digits as its factorization.

21210231095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4242046224.

The product of its (nonzero) digits is 1080, while the sum is 26.

The spelling of 21210231095 in words is "twenty-one billion, two hundred ten million, two hundred thirty-one thousand, ninety-five".