212421434 has 8 divisors (see below), whose sum is σ = 318996468. Its totient is φ = 106089280.

The previous prime is 212421431. The next prime is 212421449. The reversal of 212421434 is 434124212.

212421434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 208715809 + 3705625 = 14447^2 + 1925^2 .

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

It is not an unprimeable number, because it can be changed into a prime (212421431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58517 + ... + 62040.

Almost surely, 2^212421434 is an apocalyptic number.

212421434 is a deficient number, since it is larger than the sum of its proper divisors (106575034).

212421434 is a wasteful number, since it uses less digits than its factorization.

212421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121440.

The product of its digits is 1536, while the sum is 23.

The square root of 212421434 is about 14574.6846964180. The cubic root of 212421434 is about 596.6680439960.

Adding to 212421434 its reverse (434124212), we get a palindrome (646545646).

The spelling of 212421434 in words is "two hundred twelve million, four hundred twenty-one thousand, four hundred thirty-four".