2012020121221 has 8 divisors (see below), whose sum is σ = 2227691206944. Its totient is φ = 1801809063120.

The previous prime is 2012020121197. The next prime is 2012020121263. The reversal of 2012020121221 is 1221210202102.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-2012020121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012020121195 and 2012020121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012020121291) 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, 1365006130 + ... + 1365007603.

It is an arithmetic number, because the mean of its divisors is an integer number (278461400868).

Almost surely, 2^{2012020121221} is an apocalyptic number.

It is an amenable number.

2012020121221 is a deficient number, since it is larger than the sum of its proper divisors (215671085723).

2012020121221 is a wasteful number, since it uses less digits than its factorization.

2012020121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2730013811.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2012020121221 its reverse (1221210202102), we get a palindrome (3233230323323).

The spelling of 2012020121221 in words is "two trillion, twelve billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".