12021212013 has 16 divisors (see below), whose sum is σ = 16729022016. Its totient is φ = 7671148160.

The previous prime is 12021212009. The next prime is 12021212029. The reversal of 12021212013 is 31021212021.

It is a cyclic number.

It is not a de Polignac number, because 12021212013 - 2² = 12021212009 is a prime.

It is a super-4 number, since 4×12021212013⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 12021211983 and 12021212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021212003) 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, 915495 + ... + 928532.

It is an arithmetic number, because the mean of its divisors is an integer number (1045563876).

Almost surely, 2^12021212013 is an apocalyptic number.

It is an amenable number.

12021212013 is a deficient number, since it is larger than the sum of its proper divisors (4707810003).

12021212013 is a wasteful number, since it uses less digits than its factorization.

12021212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844124.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12021212013 its reverse (31021212021), we get a palindrome (43042424034).

The spelling of 12021212013 in words is "twelve billion, twenty-one million, two hundred twelve thousand, thirteen".