2121010404424 has 8 divisors (see below), whose sum is σ = 3976894508310. Its totient is φ = 1060505202208.

The previous prime is 2121010404413. The next prime is 2121010404493. The reversal of 2121010404424 is 4244040101212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2093178155524 + 27832248900 = 1446782^2 + 166830^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132563150269 + ... + 132563150284.

Almost surely, 2^{2121010404424} is an apocalyptic number.

It is an amenable number.

2121010404424 is a deficient number, since it is larger than the sum of its proper divisors (1855884103886).

2121010404424 is a wasteful number, since it uses less digits than its factorization.

2121010404424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265126300559 (or 265126300555 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 2121010404424 its reverse (4244040101212), we get a palindrome (6365050505636).

The spelling of 2121010404424 in words is "two trillion, one hundred twenty-one billion, ten million, four hundred four thousand, four hundred twenty-four".