21203010002 has 8 divisors (see below), whose sum is σ = 31806150012. Its totient is φ = 10600960000.

The previous prime is 21203010001. The next prime is 21203010053. The reversal of 21203010002 is 20001030212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21184511401 + 18498601 = 145549^2 + 4301^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21203010001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221999 + ... + 302802.

Almost surely, 2^21203010002 is an apocalyptic number.

21203010002 is a deficient number, since it is larger than the sum of its proper divisors (10603140010).

21203010002 is a wasteful number, since it uses less digits than its factorization.

21203010002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545004.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21203010002 its reverse (20001030212), we get a palindrome (41204040214).

The spelling of 21203010002 in words is "twenty-one billion, two hundred three million, ten thousand, two".