212401135 has 4 divisors (see below), whose sum is σ = 254881368. Its totient is φ = 169920904.

The previous prime is 212401117. The next prime is 212401177. The reversal of 212401135 is 531104212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212401135 - 2⁵ = 212401103 is a prime.

It is a super-2 number, since 2×212401135² = 90228484298576450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21240109 + ... + 21240118.

It is an arithmetic number, because the mean of its divisors is an integer number (63720342).

Almost surely, 2^212401135 is an apocalyptic number.

212401135 is a deficient number, since it is larger than the sum of its proper divisors (42480233).

212401135 is an equidigital number, since it uses as much as digits as its factorization.

212401135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42480232.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 212401135 is about 14573.9883010794. The cubic root of 212401135 is about 596.6490375172.

Adding to 212401135 its reverse (531104212), we get a palindrome (743505347).

The spelling of 212401135 in words is "two hundred twelve million, four hundred one thousand, one hundred thirty-five".