21221023202 has 16 divisors (see below), whose sum is σ = 33700570560. Its totient is φ = 9993956112.

The previous prime is 21221023199. The next prime is 21221023237. The reversal of 21221023202 is 20232012212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607438 + ... + 1620585.

It is an arithmetic number, because the mean of its divisors is an integer number (2106285660).

Almost surely, 2^21221023202 is an apocalyptic number.

21221023202 is a deficient number, since it is larger than the sum of its proper divisors (12479547358).

21221023202 is a wasteful number, since it uses less digits than its factorization.

21221023202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228217.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21221023202 its reverse (20232012212), we get a palindrome (41453035414).

The spelling of 21221023202 in words is "twenty-one billion, two hundred twenty-one million, twenty-three thousand, two hundred two".