212251106 has 4 divisors (see below), whose sum is σ = 318376662. Its totient is φ = 106125552.

The previous prime is 212251099. The next prime is 212251111. The reversal of 212251106 is 601152212.

212251106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 112550881 + 99700225 = 10609^2 + 9985^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53062775 + ... + 53062778.

Almost surely, 2^212251106 is an apocalyptic number.

212251106 is a deficient number, since it is larger than the sum of its proper divisors (106125556).

212251106 is a wasteful number, since it uses less digits than its factorization.

212251106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106125555.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 212251106 is about 14568.8402421058. The cubic root of 212251106 is about 596.5085239195.

It can be divided in two parts, 21 and 2251106, that multiplied together give a triangular number (47273226 = T₉₇₂₃).

The spelling of 212251106 in words is "two hundred twelve million, two hundred fifty-one thousand, one hundred six".