215121106 has 8 divisors (see below), whose sum is σ = 322751664. Its totient is φ = 107537220.

The previous prime is 215121103. The next prime is 215121107. The reversal of 215121106 is 601121512.

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

It is not an unprimeable number, because it can be changed into a prime (215121103) 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, 4141 + ... + 21151.

It is an arithmetic number, because the mean of its divisors is an integer number (40343958).

Almost surely, 2^215121106 is an apocalyptic number.

215121106 is a deficient number, since it is larger than the sum of its proper divisors (107630558).

215121106 is a wasteful number, since it uses less digits than its factorization.

215121106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23336.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 215121106 is about 14667.0073975573. The cubic root of 215121106 is about 599.1851029984.

Adding to 215121106 its reverse (601121512), we get a palindrome (816242618).

The spelling of 215121106 in words is "two hundred fifteen million, one hundred twenty-one thousand, one hundred six".