211020120106 has 4 divisors (see below), whose sum is σ = 316530180162. Its totient is φ = 105510060052.

The previous prime is 211020120053. The next prime is 211020120127. The reversal of 211020120106 is 601021020112.

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., 153127429225 + 57892690881 = 391315^2 + 240609^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211020120106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52755030025 + ... + 52755030028.

Almost surely, 2^211020120106 is an apocalyptic number.

211020120106 is a deficient number, since it is larger than the sum of its proper divisors (105510060056).

211020120106 is a wasteful number, since it uses less digits than its factorization.

211020120106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105510060055.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211020120106 its reverse (601021020112), we get a palindrome (812041140218).

The spelling of 211020120106 in words is "two hundred eleven billion, twenty million, one hundred twenty thousand, one hundred six".