2121342402 has 32 divisors (see below), whose sum is σ = 4450826880. Its totient is φ = 673111040.

The previous prime is 2121342401. The next prime is 2121342403. The reversal of 2121342402 is 2042431212.

It is an interprime number because it is at equal distance from previous prime (2121342401) and next prime (2121342403).

It is not an unprimeable number, because it can be changed into a prime (2121342401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73503 + ... + 98210.

It is an arithmetic number, because the mean of its divisors is an integer number (139088340).

Almost surely, 2^2121342402 is an apocalyptic number.

2121342402 is an abundant number, since it is smaller than the sum of its proper divisors (2329484478).

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

2121342402 is a wasteful number, since it uses less digits than its factorization.

2121342402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171818.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2121342402 is about 46058.0329801436. The cubic root of 2121342402 is about 1284.9027470595.

Adding to 2121342402 its reverse (2042431212), we get a palindrome (4163773614).

The spelling of 2121342402 in words is "two billion, one hundred twenty-one million, three hundred forty-two thousand, four hundred two".