2021121122001 has 4 divisors (see below), whose sum is σ = 2694828162672. Its totient is φ = 1347414081332.

The previous prime is 2021121121973. The next prime is 2021121122021. The reversal of 2021121122001 is 1002211211202.

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 a cyclic number.

It is not a de Polignac number, because 2021121122001 - 2⁹ = 2021121121489 is a prime.

It is a super-2 number, since 2×2021121122001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021121122021) 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, 336853520331 + ... + 336853520336.

It is an arithmetic number, because the mean of its divisors is an integer number (673707040668).

Almost surely, 2^{2021121122001} is an apocalyptic number.

It is an amenable number.

2021121122001 is a deficient number, since it is larger than the sum of its proper divisors (673707040671).

2021121122001 is an equidigital number, since it uses as much as digits as its factorization.

2021121122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673707040670.

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

Adding to 2021121122001 its reverse (1002211211202), we get a palindrome (3023332333203).

The spelling of 2021121122001 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, one".