2121620415020 has 24 divisors (see below), whose sum is σ = 4471843483968. Its totient is φ = 845516620800.

The previous prime is 2121620415017. The next prime is 2121620415073. The reversal of 2121620415020 is 205140261212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195716021 + ... + 195726860.

It is an arithmetic number, because the mean of its divisors is an integer number (186326811832).

Almost surely, 2^{2121620415020} is an apocalyptic number.

2121620415020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121620415020 is an abundant number, since it is smaller than the sum of its proper divisors (2350223068948).

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

2121620415020 is a wasteful number, since it uses less digits than its factorization.

2121620415020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391443161 (or 391443159 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 2121620415020 its reverse (205140261212), we get a palindrome (2326760676232).

The spelling of 2121620415020 in words is "two trillion, one hundred twenty-one billion, six hundred twenty million, four hundred fifteen thousand, twenty".