212051 has 4 divisors (see below), whose sum is σ = 242352. Its totient is φ = 181752.

The previous prime is 212039. The next prime is 212057. The reversal of 212051 is 150212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212057) 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, 15140 + ... + 15153.

It is an arithmetic number, because the mean of its divisors is an integer number (60588).

2²¹²⁰⁵¹ is an apocalyptic number.

212051 is a deficient number, since it is larger than the sum of its proper divisors (30301).

212051 is an equidigital number, since it uses as much as digits as its factorization.

212051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30300.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 212051 is about 460.4899564594. The cubic root of 212051 is about 59.6321006301.

Adding to 212051 its reverse (150212), we get a palindrome (362263).

It can be divided in two parts, 21 and 2051, that multiplied together give a triangular number (43071 = T₂₉₃).

The spelling of 212051 in words is "two hundred twelve thousand, fifty-one".