21202112030 has 32 divisors (see below), whose sum is σ = 42001698528. Its totient is φ = 7641625600.

The previous prime is 21202111999. The next prime is 21202112051. The reversal of 21202112030 is 3021120212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21202111996 and 21202112014.

It is a congruent 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, 840431 + ... + 865290.

It is an arithmetic number, because the mean of its divisors is an integer number (1312553079).

Almost surely, 2^21202112030 is an apocalyptic number.

21202112030 is a deficient number, since it is larger than the sum of its proper divisors (20799586498).

21202112030 is a wasteful number, since it uses less digits than its factorization.

21202112030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705852.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21202112030 its reverse (3021120212), we get a palindrome (24223232242).

The spelling of 21202112030 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, thirty".