2172121122 has 16 divisors (see below), whose sum is σ = 4396583520. Its totient is φ = 715316832.

The previous prime is 2172121117. The next prime is 2172121129. The reversal of 2172121122 is 2211212712.

It is a super-2 number, since 2×2172121122² = 9436220337277077768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2172121129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2180347 + ... + 2181342.

It is an arithmetic number, because the mean of its divisors is an integer number (274786470).

Almost surely, 2^2172121122 is an apocalyptic number.

2172121122 is an abundant number, since it is smaller than the sum of its proper divisors (2224462398).

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

2172121122 is a wasteful number, since it uses less digits than its factorization.

2172121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361777.

The product of its digits is 224, while the sum is 21.

The square root of 2172121122 is about 46606.0202334419. The cubic root of 2172121122 is about 1295.0742834408.

Adding to 2172121122 its reverse (2211212712), we get a palindrome (4383333834).

The spelling of 2172121122 in words is "two billion, one hundred seventy-two million, one hundred twenty-one thousand, one hundred twenty-two".