2040021311 has 4 divisors (see below), whose sum is σ = 2040598392. Its totient is φ = 2039444232.

The previous prime is 2040021283. The next prime is 2040021367. The reversal of 2040021311 is 1131200402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1131200402 = 2 ⋅565600201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2040021311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2040021391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283205 + ... + 290318.

It is an arithmetic number, because the mean of its divisors is an integer number (510149598).

Almost surely, 2^2040021311 is an apocalyptic number.

2040021311 is a deficient number, since it is larger than the sum of its proper divisors (577081).

2040021311 is an equidigital number, since it uses as much as digits as its factorization.

2040021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577080.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2040021311 is about 45166.5950786641. The cubic root of 2040021311 is about 1268.2695574012.

Adding to 2040021311 its reverse (1131200402), we get a palindrome (3171221713).

The spelling of 2040021311 in words is "two billion, forty million, twenty-one thousand, three hundred eleven".