21270203115 has 32 divisors (see below), whose sum is σ = 39257602560. Its totient is φ = 9632642304.

The previous prime is 21270203057. The next prime is 21270203147. The reversal of 21270203115 is 51130207212.

It is not a de Polignac number, because 21270203115 - 2¹⁶ = 21270137579 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 935370 + ... + 957839.

It is an arithmetic number, because the mean of its divisors is an integer number (1226800080).

Almost surely, 2^21270203115 is an apocalyptic number.

21270203115 is a deficient number, since it is larger than the sum of its proper divisors (17987399445).

21270203115 is a wasteful number, since it uses less digits than its factorization.

21270203115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893331.

The product of its (nonzero) digits is 840, while the sum is 24.

The spelling of 21270203115 in words is "twenty-one billion, two hundred seventy million, two hundred three thousand, one hundred fifteen".