2021111201001 has 4 divisors (see below), whose sum is σ = 2694814934672. Its totient is φ = 1347407467332.

The previous prime is 2021111200993. The next prime is 2021111201017. The reversal of 2021111201001 is 1001021111202.

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.

It is not a de Polignac number, because 2021111201001 - 2³ = 2021111200993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021111201051) 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, 336851866831 + ... + 336851866836.

It is an arithmetic number, because the mean of its divisors is an integer number (673703733668).

Almost surely, 2^{2021111201001} is an apocalyptic number.

It is an amenable number.

2021111201001 is a deficient number, since it is larger than the sum of its proper divisors (673703733671).

2021111201001 is an equidigital number, since it uses as much as digits as its factorization.

2021111201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673703733670.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2021111201001 its reverse (1001021111202), we get a palindrome (3022132312203).

The spelling of 2021111201001 in words is "two trillion, twenty-one billion, one hundred eleven million, two hundred one thousand, one".