21203002102 has 8 divisors (see below), whose sum is σ = 31805262216. Its totient is φ = 10601248032.

The previous prime is 21203002091. The next prime is 21203002109. The reversal of 21203002102 is 20120030212.

21203002102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203002109) 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, 5998 + ... + 206014.

It is an arithmetic number, because the mean of its divisors is an integer number (3975657777).

Almost surely, 2^21203002102 is an apocalyptic number.

21203002102 is a deficient number, since it is larger than the sum of its proper divisors (10602260114).

21203002102 is a wasteful number, since it uses less digits than its factorization.

21203002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253022.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21203002102 its reverse (20120030212), we get a palindrome (41323032314).

The spelling of 21203002102 in words is "twenty-one billion, two hundred three million, two thousand, one hundred two".