2011222001021 has 12 divisors (see below), whose sum is σ = 2102755936092. Its totient is φ = 1923514439616.

The previous prime is 2011222001011. The next prime is 2011222001029. The reversal of 2011222001021 is 1201002221102.

It can be written as a sum of positive squares in 2 ways, for example, as 1721315136121 + 289906864900 = 1311989^2 + 538430^2 .

It is not a de Polignac number, because 2011222001021 - 2¹⁴ = 2011221984637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2011222000987 and 2011222001005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011222001029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3667295 + ... + 4179891.

It is an arithmetic number, because the mean of its divisors is an integer number (175229661341).

Almost surely, 2^{2011222001021} is an apocalyptic number.

It is an amenable number.

2011222001021 is a deficient number, since it is larger than the sum of its proper divisors (91533935071).

2011222001021 is an equidigital number, since it uses as much as digits as its factorization.

2011222001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520060 (or 520037 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2011222001021 its reverse (1201002221102), we get a palindrome (3212224222123).

The spelling of 2011222001021 in words is "two trillion, eleven billion, two hundred twenty-two million, one thousand, twenty-one".