21201112030 has 64 divisors (see below), whose sum is σ = 44893274112. Its totient is φ = 7058136960.

The previous prime is 21201112027. The next prime is 21201112033. The reversal of 21201112030 is 3021110212.

It is an interprime number because it is at equal distance from previous prime (21201112027) and next prime (21201112033).

It is a super-2 number, since 2×21201112030² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21201112030.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201112033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 392460 + ... + 443200.

It is an arithmetic number, because the mean of its divisors is an integer number (701457408).

Almost surely, 2^21201112030 is an apocalyptic number.

21201112030 is an abundant number, since it is smaller than the sum of its proper divisors (23692162082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21201112030 is a wasteful number, since it uses less digits than its factorization.

21201112030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50929.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21201112030 its reverse (3021110212), we get a palindrome (24222222242).

The spelling of 21201112030 in words is "twenty-one billion, two hundred one million, one hundred twelve thousand, thirty".