21120201002 has 4 divisors (see below), whose sum is σ = 31680301506. Its totient is φ = 10560100500.

The previous prime is 21120200993. The next prime is 21120201029. The reversal of 21120201002 is 20010202112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21045014761 + 75186241 = 145069^2 + 8671^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280050249 + ... + 5280050252.

Almost surely, 2^21120201002 is an apocalyptic number.

21120201002 is a deficient number, since it is larger than the sum of its proper divisors (10560100504).

21120201002 is a wasteful number, since it uses less digits than its factorization.

21120201002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560100503.

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

Adding to 21120201002 its reverse (20010202112), we get a palindrome (41130403114).

The spelling of 21120201002 in words is "twenty-one billion, one hundred twenty million, two hundred one thousand, two".