2012121201021 has 16 divisors (see below), whose sum is σ = 2695867958784. Its totient is φ = 1334898794304.

The previous prime is 2012121201019. The next prime is 2012121201023. The reversal of 2012121201021 is 1201021212102.

It is an interprime number because it is at equal distance from previous prime (2012121201019) and next prime (2012121201023).

It is not a de Polignac number, because 2012121201021 - 2¹ = 2012121201019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012121201023) 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, 1229155 + ... + 2352671.

It is an arithmetic number, because the mean of its divisors is an integer number (168491747424).

Almost surely, 2^{2012121201021} is an apocalyptic number.

It is an amenable number.

2012121201021 is a deficient number, since it is larger than the sum of its proper divisors (683746757763).

2012121201021 is a wasteful number, since it uses less digits than its factorization.

2012121201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126420.

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

Adding to 2012121201021 its reverse (1201021212102), we get a palindrome (3213142413123).

The spelling of 2012121201021 in words is "two trillion, twelve billion, one hundred twenty-one million, two hundred one thousand, twenty-one".