21000212040002 has 8 divisors (see below), whose sum is σ = 33923419449276. Its totient is φ = 9692405556912.

The previous prime is 21000212039987. The next prime is 21000212040083. The reversal of 21000212040002 is 20004021200012.

It can be written as a sum of positive squares in 2 ways, for example, as 20997555771481 + 2656268521 = 4582309^2 + 51539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 403850231513 + ... + 403850231564.

Almost surely, 2^{21000212040002} is an apocalyptic number.

21000212040002 is a deficient number, since it is larger than the sum of its proper divisors (12923207409274).

21000212040002 is a wasteful number, since it uses less digits than its factorization.

21000212040002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807700463092.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21000212040002 its reverse (20004021200012), we get a palindrome (41004233240014).

The spelling of 21000212040002 in words is "twenty-one trillion, two hundred twelve million, forty thousand, two".