2021021211001 has 16 divisors (see below), whose sum is σ = 2178614824960. Its totient is φ = 1863732551040.

The previous prime is 2021021210983. The next prime is 2021021211031. The reversal of 2021021211001 is 1001121201202.

It is a cyclic number.

It is not a de Polignac number, because 2021021211001 - 2¹¹ = 2021021208953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021021211031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121717966 + ... + 121734568.

It is an arithmetic number, because the mean of its divisors is an integer number (136163426560).

Almost surely, 2^{2021021211001} is an apocalyptic number.

It is an amenable number.

2021021211001 is a deficient number, since it is larger than the sum of its proper divisors (157593613959).

2021021211001 is a wasteful number, since it uses less digits than its factorization.

2021021211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25216.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2021021211001 its reverse (1001121201202), we get a palindrome (3022142412203).

The spelling of 2021021211001 in words is "two trillion, twenty-one billion, twenty-one million, two hundred eleven thousand, one".