21012222195 has 12 divisors (see below), whose sum is σ = 36421185216. Its totient is φ = 11206518480.

The previous prime is 21012222193. The next prime is 21012222221. The reversal of 21012222195 is 59122221012.

It is a happy number.

It is not a de Polignac number, because 21012222195 - 2¹ = 21012222193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21012222193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233469091 + ... + 233469180.

It is an arithmetic number, because the mean of its divisors is an integer number (3035098768).

Almost surely, 2^21012222195 is an apocalyptic number.

21012222195 is a deficient number, since it is larger than the sum of its proper divisors (15408963021).

21012222195 is a wasteful number, since it uses less digits than its factorization.

21012222195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466938282 (or 466938279 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 21012222195 in words is "twenty-one billion, twelve million, two hundred twenty-two thousand, one hundred ninety-five".