21212075404695 has 192 divisors, whose sum is σ = 40011527356416. Its totient is φ = 9567527880960.

The previous prime is 21212075404693. The next prime is 21212075404717. The reversal of 21212075404695 is 59640457021212.

It is a happy number.

It is not a de Polignac number, because 21212075404695 - 2¹ = 21212075404693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212075404691) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 17231579730 + ... + 17231580960.

It is an arithmetic number, because the mean of its divisors is an integer number (208393371648).

Almost surely, 2^{21212075404695} is an apocalyptic number.

21212075404695 is a deficient number, since it is larger than the sum of its proper divisors (18799451951721).

21212075404695 is a wasteful number, since it uses less digits than its factorization.

21212075404695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250 (or 2243 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 21212075404695 in words is "twenty-one trillion, two hundred twelve billion, seventy-five million, four hundred four thousand, six hundred ninety-five".