212421507 has 8 divisors (see below), whose sum is σ = 284571840. Its totient is φ = 140942760.

The previous prime is 212421481. The next prime is 212421523. The reversal of 212421507 is 705124212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212421507 - 2¹² = 212417411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212423507) 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 7 ways as a sum of consecutive naturals, for example, 167157 + ... + 168422.

It is an arithmetic number, because the mean of its divisors is an integer number (35571480).

Almost surely, 2^212421507 is an apocalyptic number.

212421507 is a deficient number, since it is larger than the sum of its proper divisors (72150333).

212421507 is a wasteful number, since it uses less digits than its factorization.

212421507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335793.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 212421507 is about 14574.6872007601. The cubic root of 212421507 is about 596.6681123456.

Adding to 212421507 its reverse (705124212), we get a palindrome (917545719).

The spelling of 212421507 in words is "two hundred twelve million, four hundred twenty-one thousand, five hundred seven".