21021212311230 has 16 divisors (see below), whose sum is σ = 50450909547024. Its totient is φ = 5605656616320.

The previous prime is 21021212311219. The next prime is 21021212311331. The reversal of 21021212311230 is 3211321212012.

It is a super-2 number, since 2×21021212311230² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21021212311197 and 21021212311206.

It is a congruent number.

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, 350353538491 + ... + 350353538550.

It is an arithmetic number, because the mean of its divisors is an integer number (3153181846689).

Almost surely, 2^{21021212311230} is an apocalyptic number.

21021212311230 is an abundant number, since it is smaller than the sum of its proper divisors (29429697235794).

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

21021212311230 is a wasteful number, since it uses less digits than its factorization.

21021212311230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700707077051.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21021212311230 its reverse (3211321212012), we get a palindrome (24232533523242).

The spelling of 21021212311230 in words is "twenty-one trillion, twenty-one billion, two hundred twelve million, three hundred eleven thousand, two hundred thirty".