2206166121 has 6 divisors (see below), whose sum is σ = 3186684410. Its totient is φ = 1470777408.

The previous prime is 2206166113. The next prime is 2206166197. The reversal of 2206166121 is 1216616022.

2206166121 is a `hidden beast` number, since 2 + 20 + 616 + 6 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1583164521 + 623001600 = 39789^2 + 24960^2 .

It is not a de Polignac number, because 2206166121 - 2³ = 2206166113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2206166101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122564776 + ... + 122564793.

Almost surely, 2^2206166121 is an apocalyptic number.

It is an amenable number.

2206166121 is a deficient number, since it is larger than the sum of its proper divisors (980518289).

2206166121 is a wasteful number, since it uses less digits than its factorization.

2206166121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245129575 (or 245129572 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 2206166121 is about 46969.8426759128. The cubic root of 2206166121 is about 1301.8054049538.

The spelling of 2206166121 in words is "two billion, two hundred six million, one hundred sixty-six thousand, one hundred twenty-one".