21270012097 has 8 divisors (see below), whose sum is σ = 22007304000. Its totient is φ = 20532976464.

The previous prime is 21270012083. The next prime is 21270012139. The reversal of 21270012097 is 79021007212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21270012097 - 2⁷ = 21270011969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21270012007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113154 + ... + 235252.

It is an arithmetic number, because the mean of its divisors is an integer number (2750913000).

Almost surely, 2^21270012097 is an apocalyptic number.

It is an amenable number.

21270012097 is a deficient number, since it is larger than the sum of its proper divisors (737291903).

21270012097 is a wasteful number, since it uses less digits than its factorization.

21270012097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128135.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 21270012097 in words is "twenty-one billion, two hundred seventy million, twelve thousand, ninety-seven".