2172154122 has 12 divisors (see below), whose sum is σ = 4706333970. Its totient is φ = 724051368.

The previous prime is 2172154121. The next prime is 2172154163. The reversal of 2172154122 is 2214512712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1872206361 + 299947761 = 43269^2 + 17319^2 .

It is not an unprimeable number, because it can be changed into a prime (2172154121) 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, 60337597 + ... + 60337632.

Almost surely, 2^2172154122 is an apocalyptic number.

2172154122 is an abundant number, since it is smaller than the sum of its proper divisors (2534179848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2172154122 is a wasteful number, since it uses less digits than its factorization.

2172154122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120675237 (or 120675234 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2172154122 is about 46606.3742636133. The cubic root of 2172154122 is about 1295.0808418895.

Adding to 2172154122 its reverse (2214512712), we get a palindrome (4386666834).

The spelling of 2172154122 in words is "two billion, one hundred seventy-two million, one hundred fifty-four thousand, one hundred twenty-two".