2102221312 has 20 divisors (see below), whose sum is σ = 4200337746. Its totient is φ = 1051110400.

The previous prime is 2102221273. The next prime is 2102221337. The reversal of 2102221312 is 2131222012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1087416576 + 1014804736 = 32976^2 + 31856^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2052439 + ... + 2053462.

Almost surely, 2^2102221312 is an apocalyptic number.

It is an amenable number.

2102221312 is a deficient number, since it is larger than the sum of its proper divisors (2098116434).

2102221312 is an frugal number, since it uses more digits than its factorization.

2102221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105919 (or 4105903 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2102221312 is about 45849.9870447092. The cubic root of 2102221312 is about 1281.0305242719.

Adding to 2102221312 its reverse (2131222012), we get a palindrome (4233443324).

It can be divided in two parts, 21022213 and 12, that added together give a square (21022225 = 4585²).

The spelling of 2102221312 in words is "two billion, one hundred two million, two hundred twenty-one thousand, three hundred twelve".