21120212303030 has 32 divisors (see below), whose sum is σ = 40257206051040. Its totient is φ = 7950236797440.

The previous prime is 21120212303023. The next prime is 21120212303039. The reversal of 21120212303030 is 3030321202112.

It is a junction number, because it is equal to n+sod(n) for n = 21120212302993 and 21120212303011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120212303039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5542520 + ... + 8541659.

It is an arithmetic number, because the mean of its divisors is an integer number (1258037689095).

Almost surely, 2^{21120212303030} is an apocalyptic number.

21120212303030 is a deficient number, since it is larger than the sum of its proper divisors (19136993748010).

21120212303030 is a wasteful number, since it uses less digits than its factorization.

21120212303030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14093024.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21120212303030 its reverse (3030321202112), we get a palindrome (24150533505142).

The spelling of 21120212303030 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, three hundred three thousand, thirty".