12020010101221 has 4 divisors (see below), whose sum is σ = 12020426869312. Its totient is φ = 12019593333132.

The previous prime is 12020010101167. The next prime is 12020010101263. The reversal of 12020010101221 is 12210101002021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12020010101221 - 2⁷ = 12020010101093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020010401221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208340781 + ... + 208398466.

It is an arithmetic number, because the mean of its divisors is an integer number (3005106717328).

Almost surely, 2^{12020010101221} is an apocalyptic number.

It is an amenable number.

12020010101221 is a deficient number, since it is larger than the sum of its proper divisors (416768091).

12020010101221 is an equidigital number, since it uses as much as digits as its factorization.

12020010101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416768090.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12020010101221 its reverse (12210101002021), we get a palindrome (24230111103242).

The spelling of 12020010101221 in words is "twelve trillion, twenty billion, ten million, one hundred one thousand, two hundred twenty-one".