21030230021212 has 24 divisors (see below), whose sum is σ = 37016242628400. Its totient is φ = 10454162691456.

The previous prime is 21030230021197. The next prime is 21030230021219. The reversal of 21030230021212 is 21212003203012.

It is a self number, because there is not a number n which added to its sum of digits gives 21030230021212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030230021219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49063239 + ... + 49490017.

It is an arithmetic number, because the mean of its divisors is an integer number (1542343442850).

Almost surely, 2^{21030230021212} is an apocalyptic number.

It is an amenable number.

21030230021212 is a deficient number, since it is larger than the sum of its proper divisors (15986012607188).

21030230021212 is a wasteful number, since it uses less digits than its factorization.

21030230021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498165 (or 498163 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21030230021212 its reverse (21212003203012), we get a palindrome (42242233224224).

The spelling of 21030230021212 in words is "twenty-one trillion, thirty billion, two hundred thirty million, twenty-one thousand, two hundred twelve".