12020112001221 has 8 divisors (see below), whose sum is σ = 16027454951424. Its totient is φ = 8013088525920.

The previous prime is 12020112001211. The next prime is 12020112001223. The reversal of 12020112001221 is 12210021102021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12020112001221 - 2²¹ = 12020109904069 is a prime.

It is a super-2 number, since 2×12020112001221² (a number of 27 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 12020112001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020112001223) 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, 79780920 + ... + 79931441.

It is an arithmetic number, because the mean of its divisors is an integer number (2003431868928).

Almost surely, 2^{12020112001221} is an apocalyptic number.

It is an amenable number.

12020112001221 is a deficient number, since it is larger than the sum of its proper divisors (4007342950203).

12020112001221 is a wasteful number, since it uses less digits than its factorization.

12020112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159737451.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12020112001221 its reverse (12210021102021), we get a palindrome (24230133103242).

The spelling of 12020112001221 in words is "twelve trillion, twenty billion, one hundred twelve million, one thousand, two hundred twenty-one".