2145221012 has 48 divisors (see below), whose sum is σ = 4155205824. Its totient is φ = 960960000.

The previous prime is 2145221009. The next prime is 2145221027. The reversal of 2145221012 is 2101225412.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1070003 + ... + 1072005.

It is an arithmetic number, because the mean of its divisors is an integer number (86566788).

Almost surely, 2^2145221012 is an apocalyptic number.

2145221012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2145221012 is a deficient number, since it is larger than the sum of its proper divisors (2009984812).

2145221012 is a wasteful number, since it uses less digits than its factorization.

2145221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 2145221012 is about 46316.5306559116. The cubic root of 2145221012 is about 1289.7058825092.

Adding to 2145221012 its reverse (2101225412), we get a palindrome (4246446424).

The spelling of 2145221012 in words is "two billion, one hundred forty-five million, two hundred twenty-one thousand, twelve".