2121434004020 has 24 divisors (see below), whose sum is σ = 4482342773664. Its totient is φ = 843367627296.

The previous prime is 2121434004007. The next prime is 2121434004071. The reversal of 2121434004020 is 204004341212.

It is a super-3 number, since 3×2121434004020³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

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, 325370054 + ... + 325376573.

It is an arithmetic number, because the mean of its divisors is an integer number (186764282236).

Almost surely, 2^{2121434004020} is an apocalyptic number.

2121434004020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121434004020 is an abundant number, since it is smaller than the sum of its proper divisors (2360908769644).

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

2121434004020 is a wasteful number, since it uses less digits than its factorization.

2121434004020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650746799 (or 650746797 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 2121434004020 its reverse (204004341212), we get a palindrome (2325438345232).

The spelling of 2121434004020 in words is "two trillion, one hundred twenty-one billion, four hundred thirty-four million, four thousand, twenty".