212099990 has 48 divisors (see below), whose sum is σ = 411134400. Its totient is φ = 78753792.

The previous prime is 212099981. The next prime is 212100017. The reversal of 212099990 is 99990212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227846 + ... + 228774.

It is an arithmetic number, because the mean of its divisors is an integer number (8565300).

Almost surely, 2^212099990 is an apocalyptic number.

212099990 is a deficient number, since it is larger than the sum of its proper divisors (199034410).

212099990 is a wasteful number, since it uses less digits than its factorization.

212099990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1032 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 212099990 is about 14563.6530444803. The cubic root of 212099990 is about 596.3669253118.

The spelling of 212099990 in words is "two hundred twelve million, ninety-nine thousand, nine hundred ninety".