2012021210121 has 16 divisors (see below), whose sum is σ = 2921517406080. Its totient is φ = 1224254908800.

The previous prime is 2012021210107. The next prime is 2012021210123. The reversal of 2012021210121 is 1210121202102.

It is not a de Polignac number, because 2012021210121 - 2¹⁷ = 2012021079049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2012021210121.

It is not an unprimeable number, because it can be changed into a prime (2012021210123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289829605 + ... + 289836546.

It is an arithmetic number, because the mean of its divisors is an integer number (182594837880).

Almost surely, 2^{2012021210121} is an apocalyptic number.

It is an amenable number.

2012021210121 is a deficient number, since it is larger than the sum of its proper divisors (909496195959).

2012021210121 is a wasteful number, since it uses less digits than its factorization.

2012021210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579666256.

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

Adding to 2012021210121 its reverse (1210121202102), we get a palindrome (3222142412223).

The spelling of 2012021210121 in words is "two trillion, twelve billion, twenty-one million, two hundred ten thousand, one hundred twenty-one".