2121150245020 has 24 divisors (see below), whose sum is σ = 4688858437200. Its totient is φ = 803804303232.

The previous prime is 2121150245017. The next prime is 2121150245021. The reversal of 2121150245020 is 205420511212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121150245021) 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, 2790986785 + ... + 2790987544.

It is an arithmetic number, because the mean of its divisors is an integer number (195369101550).

Almost surely, 2^{2121150245020} is an apocalyptic number.

2121150245020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121150245020 is an abundant number, since it is smaller than the sum of its proper divisors (2567708192180).

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

2121150245020 is a wasteful number, since it uses less digits than its factorization.

2121150245020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5581974357 (or 5581974355 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 2121150245020 its reverse (205420511212), we get a palindrome (2326570756232).

The spelling of 2121150245020 in words is "two trillion, one hundred twenty-one billion, one hundred fifty million, two hundred forty-five thousand, twenty".