212092921 has 8 divisors (see below), whose sum is σ = 221137920. Its totient is φ = 203163408.

The previous prime is 212092919. The next prime is 212092927. The reversal of 212092921 is 129290212.

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

It is a cyclic number.

It is not a de Polignac number, because 212092921 - 2¹ = 212092919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212092921.

It is not an unprimeable number, because it can be changed into a prime (212092927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25111 + ... + 32476.

It is an arithmetic number, because the mean of its divisors is an integer number (27642240).

Almost surely, 2^212092921 is an apocalyptic number.

It is an amenable number.

212092921 is a deficient number, since it is larger than the sum of its proper divisors (9044999).

212092921 is a wasteful number, since it uses less digits than its factorization.

212092921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57743.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 212092921 is about 14563.4103492280. The cubic root of 212092921 is about 596.3602998760.

The spelling of 212092921 in words is "two hundred twelve million, ninety-two thousand, nine hundred twenty-one".