2145121012 has 48 divisors (see below), whose sum is σ = 3955875840. Its totient is φ = 1016517600.

The previous prime is 2145121009. The next prime is 2145121019. The reversal of 2145121012 is 2101215412.

It is a super-2 number, since 2×2145121012² = 9203088312247808288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145121019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1469539 + ... + 1470997.

It is an arithmetic number, because the mean of its divisors is an integer number (82414080).

Almost surely, 2^2145121012 is an apocalyptic number.

It is an amenable number.

2145121012 is a deficient number, since it is larger than the sum of its proper divisors (1810754828).

2145121012 is a wasteful number, since it uses less digits than its factorization.

2145121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732 (or 1730 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2145121012 is about 46315.4511151516. The cubic root of 2145121012 is about 1289.6858422132.

Adding to 2145121012 its reverse (2101215412), we get a palindrome (4246336424).

The spelling of 2145121012 in words is "two billion, one hundred forty-five million, one hundred twenty-one thousand, twelve".