2121400240004 has 24 divisors (see below), whose sum is σ = 3930887566368. Its totient is φ = 998291338880.

The previous prime is 2121400239991. The next prime is 2121400240039. The reversal of 2121400240004 is 4000420041212.

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, 5473139 + ... + 5847909.

It is an arithmetic number, because the mean of its divisors is an integer number (163786981932).

Almost surely, 2^{2121400240004} is an apocalyptic number.

It is an amenable number.

2121400240004 is a deficient number, since it is larger than the sum of its proper divisors (1809487326364).

2121400240004 is a wasteful number, since it uses less digits than its factorization.

2121400240004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458035 (or 458033 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2121400240004 its reverse (4000420041212), we get a palindrome (6121820281216).

The spelling of 2121400240004 in words is "two trillion, one hundred twenty-one billion, four hundred million, two hundred forty thousand, four".