2012001222121 has 16 divisors (see below), whose sum is σ = 2226525166080. Its totient is φ = 1802781256320.

The previous prime is 2012001222113. The next prime is 2012001222157. The reversal of 2012001222121 is 1212221002102.

It is a happy number.

It is not a de Polignac number, because 2012001222121 - 2³ = 2012001222113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2012001222095 and 2012001222104.

It is not an unprimeable number, because it can be changed into a prime (2012001222421) 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, 284911 + ... + 2026123.

It is an arithmetic number, because the mean of its divisors is an integer number (139157822880).

Almost surely, 2^{2012001222121} is an apocalyptic number.

It is an amenable number.

2012001222121 is a deficient number, since it is larger than the sum of its proper divisors (214523943959).

2012001222121 is a wasteful number, since it uses less digits than its factorization.

2012001222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742736.

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

Adding to 2012001222121 its reverse (1212221002102), we get a palindrome (3224222224223).

The spelling of 2012001222121 in words is "two trillion, twelve billion, one million, two hundred twenty-two thousand, one hundred twenty-one".