21001210202 has 32 divisors (see below), whose sum is σ = 38223871488. Its totient is φ = 8447959296.

The previous prime is 21001210187. The next prime is 21001210211. The reversal of 21001210202 is 20201210012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32873 + ... + 207564.

It is an arithmetic number, because the mean of its divisors is an integer number (1194495984).

Almost surely, 2^21001210202 is an apocalyptic number.

21001210202 is a deficient number, since it is larger than the sum of its proper divisors (17222661286).

21001210202 is a wasteful number, since it uses less digits than its factorization.

21001210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240830.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21001210202 its reverse (20201210012), we get a palindrome (41202420214).

The spelling of 21001210202 in words is "twenty-one billion, one million, two hundred ten thousand, two hundred two".