2121344440402 has 32 divisors (see below), whose sum is σ = 3622752604800. Its totient is φ = 922187185920.

The previous prime is 2121344440331. The next prime is 2121344440433. The reversal of 2121344440402 is 2040444431212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3150724 + ... + 3764272.

It is an arithmetic number, because the mean of its divisors is an integer number (113211018900).

Almost surely, 2^{2121344440402} is an apocalyptic number.

2121344440402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2121344440402 is a deficient number, since it is larger than the sum of its proper divisors (1501408164398).

2121344440402 is a wasteful number, since it uses less digits than its factorization.

2121344440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620418.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 2121344440402 its reverse (2040444431212), we get a palindrome (4161788871614).

The spelling of 2121344440402 in words is "two trillion, one hundred twenty-one billion, three hundred forty-four million, four hundred forty thousand, four hundred two".