2021012221111 has 8 divisors (see below), whose sum is σ = 2291025999920. Its totient is φ = 1767362913792.

The previous prime is 2021012221099. The next prime is 2021012221157. The reversal of 2021012221111 is 1111222101202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021012221111 - 2⁹ = 2021012220599 is a prime.

It is a super-3 number, since 3×2021012221111³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021012221211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4091117610 + ... + 4091118103.

It is an arithmetic number, because the mean of its divisors is an integer number (286378249990).

Almost surely, 2^{2021012221111} is an apocalyptic number.

2021012221111 is a deficient number, since it is larger than the sum of its proper divisors (270013778809).

2021012221111 is a wasteful number, since it uses less digits than its factorization.

2021012221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182235745.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2021012221111 its reverse (1111222101202), we get a palindrome (3132234322313).

The spelling of 2021012221111 in words is "two trillion, twenty-one billion, twelve million, two hundred twenty-one thousand, one hundred eleven".