210002120400004 has 12 divisors (see below), whose sum is σ = 367539263032284. Its totient is φ = 104990902390784.

The previous prime is 210002120399987. The next prime is 210002120400029. The reversal of 210002120400004 is 400004021200012.

It can be written as a sum of positive squares in 2 ways, for example, as 115894698393600 + 94107422006404 = 10765440^2 + 9700898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2539405789 + ... + 2539488484.

It is an arithmetic number, because the mean of its divisors is an integer number (30628271919357).

Almost surely, 2^{210002120400004} is an apocalyptic number.

It is an amenable number.

210002120400004 is a deficient number, since it is larger than the sum of its proper divisors (157537142632280).

210002120400004 is a wasteful number, since it uses less digits than its factorization.

210002120400004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5078904614 (or 5078904612 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 210002120400004 its reverse (400004021200012), we get a palindrome (610006141600016).

The spelling of 210002120400004 in words is "two hundred ten trillion, two billion, one hundred twenty million, four hundred thousand, four".