21011153195 has 4 divisors (see below), whose sum is σ = 25213383840. Its totient is φ = 16808922552.

The previous prime is 21011153183. The next prime is 21011153201. The reversal of 21011153195 is 59135111012.

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 21011153195 - 2³⁰ = 19937411371 is a prime.

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, 2101115315 + ... + 2101115324.

It is an arithmetic number, because the mean of its divisors is an integer number (6303345960).

Almost surely, 2^21011153195 is an apocalyptic number.

21011153195 is a deficient number, since it is larger than the sum of its proper divisors (4202230645).

21011153195 is an equidigital number, since it uses as much as digits as its factorization.

21011153195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202230644.

The product of its (nonzero) digits is 1350, while the sum is 29.

The spelling of 21011153195 in words is "twenty-one billion, eleven million, one hundred fifty-three thousand, one hundred ninety-five".