21211212095 has 8 divisors (see below), whose sum is σ = 25995017664. Its totient is φ = 16607927584.

The previous prime is 21211212083. The next prime is 21211212107. The reversal of 21211212095 is 59021211212.

It is an interprime number because it is at equal distance from previous prime (21211212083) and next prime (21211212107).

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 21211212095 - 2⁶ = 21211212031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45130004 + ... + 45130473.

It is an arithmetic number, because the mean of its divisors is an integer number (3249377208).

Almost surely, 2^21211212095 is an apocalyptic number.

21211212095 is a deficient number, since it is larger than the sum of its proper divisors (4783805569).

21211212095 is an equidigital number, since it uses as much as digits as its factorization.

21211212095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90260529.

The product of its (nonzero) digits is 720, while the sum is 26.

The spelling of 21211212095 in words is "twenty-one billion, two hundred eleven million, two hundred twelve thousand, ninety-five".