2021211001 has 4 divisors (see below), whose sum is σ = 2068215952. Its totient is φ = 1974206052.

The previous prime is 2021210993. The next prime is 2021211011. The reversal of 2021211001 is 1001121202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001121202 = 2 ⋅500560601.

It is a cyclic number.

It is not a de Polignac number, because 2021211001 - 2³ = 2021210993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021211011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23502411 + ... + 23502496.

It is an arithmetic number, because the mean of its divisors is an integer number (517053988).

Almost surely, 2^2021211001 is an apocalyptic number.

It is an amenable number.

2021211001 is a deficient number, since it is larger than the sum of its proper divisors (47004951).

2021211001 is an equidigital number, since it uses as much as digits as its factorization.

2021211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47004950.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2021211001 is about 44957.8802992312. The cubic root of 2021211001 is about 1264.3594273822.

Adding to 2021211001 its reverse (1001121202), we get a palindrome (3022332203).

It can be divided in two parts, 20212 and 11001, that added together give a palindrome (31213).

The spelling of 2021211001 in words is "two billion, twenty-one million, two hundred eleven thousand, one".