212267450421 has 64 divisors (see below), whose sum is σ = 359668189440. Its totient is φ = 122569666560.

The previous prime is 212267450419. The next prime is 212267450443. The reversal of 212267450421 is 124054762212.

212267450421 is a `hidden beast` number, since 2 + 1 + 226 + 7 + 4 + 5 + 0 + 421 = 666.

It is not a de Polignac number, because 212267450421 - 2¹ = 212267450419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212267450321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1921341 + ... + 2028813.

It is an arithmetic number, because the mean of its divisors is an integer number (5619815460).

Almost surely, 2^212267450421 is an apocalyptic number.

It is an amenable number.

212267450421 is a deficient number, since it is larger than the sum of its proper divisors (147400739019).

212267450421 is a wasteful number, since it uses less digits than its factorization.

212267450421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107843 (or 107837 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 212267450421 in words is "two hundred twelve billion, two hundred sixty-seven million, four hundred fifty thousand, four hundred twenty-one".