2012022121221 has 32 divisors (see below), whose sum is σ = 3418225009920. Its totient is φ = 1145802912192.

The previous prime is 2012022121217. The next prime is 2012022121237. The reversal of 2012022121221 is 1221212202102.

It is a happy number.

2012022121221 is a `hidden beast` number, since 201 + 2 + 0 + 221 + 21 + 221 = 666.

It is not a de Polignac number, because 2012022121221 - 2² = 2012022121217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012022121194 and 2012022121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012022121211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18111210 + ... + 18221963.

It is an arithmetic number, because the mean of its divisors is an integer number (106819531560).

Almost surely, 2^{2012022121221} is an apocalyptic number.

2012022121221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2012022121221 is a deficient number, since it is larger than the sum of its proper divisors (1406202888699).

2012022121221 is a wasteful number, since it uses less digits than its factorization.

2012022121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36333482 (or 36333476 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2012022121221 its reverse (1221212202102), we get a palindrome (3233234323323).

The spelling of 2012022121221 in words is "two trillion, twelve billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".