2012111121021 has 16 divisors (see below), whose sum is σ = 2684055650304. Its totient is φ = 1340787140784.

The previous prime is 2012111121011. The next prime is 2012111121049. The reversal of 2012111121021 is 1201211112102.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-2012111121021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012111121001) 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, 93562756 + ... + 93584258.

It is an arithmetic number, because the mean of its divisors is an integer number (167753478144).

Almost surely, 2^{2012111121021} is an apocalyptic number.

It is an amenable number.

2012111121021 is a deficient number, since it is larger than the sum of its proper divisors (671944529283).

2012111121021 is a wasteful number, since it uses less digits than its factorization.

2012111121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34480.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2012111121021 its reverse (1201211112102), we get a palindrome (3213322233123).

The spelling of 2012111121021 in words is "two trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, twenty-one".