2012220212121 has 80 divisors (see below), whose sum is σ = 3473634003840. Its totient is φ = 1137088834560.

The previous prime is 2012220212117. The next prime is 2012220212137. The reversal of 2012220212121 is 1212120222102.

It is a happy number.

It is not a de Polignac number, because 2012220212121 - 2² = 2012220212117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2012220212094 and 2012220212103.

It is not an unprimeable number, because it can be changed into a prime (2012220712121) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 18315465 + ... + 18425001.

It is an arithmetic number, because the mean of its divisors is an integer number (43420425048).

Almost surely, 2^{2012220212121} is an apocalyptic number.

2012220212121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2012220212121 is a deficient number, since it is larger than the sum of its proper divisors (1461413791719).

2012220212121 is a wasteful number, since it uses less digits than its factorization.

2012220212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109916 (or 109907 counting only the distinct ones).

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

Adding to 2012220212121 its reverse (1212120222102), we get a palindrome (3224340434223).

The spelling of 2012220212121 in words is "two trillion, twelve billion, two hundred twenty million, two hundred twelve thousand, one hundred twenty-one".