2021112121101 has 8 divisors (see below), whose sum is σ = 2727283826400. Its totient is φ = 1331174248272.

The previous prime is 2021112121043. The next prime is 2021112121129. The reversal of 2021112121101 is 1011212111202.

It is a happy number.

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

It is not a de Polignac number, because 2021112121101 - 2⁶ = 2021112121037 is a prime.

It is a super-2 number, since 2×2021112121101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021112121601) 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, 4058457826 + ... + 4058458323.

It is an arithmetic number, because the mean of its divisors is an integer number (340910478300).

Almost surely, 2^{2021112121101} is an apocalyptic number.

It is an amenable number.

2021112121101 is a deficient number, since it is larger than the sum of its proper divisors (706171705299).

2021112121101 is an equidigital number, since it uses as much as digits as its factorization.

2021112121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116916235.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2021112121101 its reverse (1011212111202), we get a palindrome (3032324232303).

The spelling of 2021112121101 in words is "two trillion, twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred one".