210221242 has 32 divisors (see below), whose sum is σ = 410241024. Its totient is φ = 78342000.

The previous prime is 210221233. The next prime is 210221251. The reversal of 210221242 is 242122012.

It is an interprime number because it is at equal distance from previous prime (210221233) and next prime (210221251).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26134 + ... + 33217.

It is an arithmetic number, because the mean of its divisors is an integer number (12820032).

Almost surely, 2^210221242 is an apocalyptic number.

210221242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

210221242 is a deficient number, since it is larger than the sum of its proper divisors (200019782).

210221242 is a wasteful number, since it uses less digits than its factorization.

210221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59394.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 210221242 is about 14499.0083109156. The cubic root of 210221242 is about 594.6008593455.

Adding to 210221242 its reverse (242122012), we get a palindrome (452343254).

The spelling of 210221242 in words is "two hundred ten million, two hundred twenty-one thousand, two hundred forty-two".