212345101 has 4 divisors (see below), whose sum is σ = 215254012. Its totient is φ = 209436192.

The previous prime is 212345093. The next prime is 212345123. The reversal of 212345101 is 101543212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47196900 + 165148201 = 6870^2 + 12851^2 .

It is a cyclic number.

It is not a de Polignac number, because 212345101 - 2³ = 212345093 is a prime.

It is a super-3 number, since 3×212345101³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212345171) 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, 1454346 + ... + 1454491.

It is an arithmetic number, because the mean of its divisors is an integer number (53813503).

Almost surely, 2^212345101 is an apocalyptic number.

It is an amenable number.

212345101 is a deficient number, since it is larger than the sum of its proper divisors (2908911).

212345101 is an equidigital number, since it uses as much as digits as its factorization.

212345101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908910.

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

The square root of 212345101 is about 14572.0657766838. The cubic root of 212345101 is about 596.5965651476.

Adding to 212345101 its reverse (101543212), we get a palindrome (313888313).

It can be divided in two parts, 21234 and 5101, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 212345101 in words is "two hundred twelve million, three hundred forty-five thousand, one hundred one".