2021220121101 has 4 divisors (see below), whose sum is σ = 2694960161472. Its totient is φ = 1347480080732.

The previous prime is 2021220121093. The next prime is 2021220121133. The reversal of 2021220121101 is 1011210221202.

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 2021220121101 - 2³ = 2021220121093 is a prime.

It is a super-2 number, since 2×2021220121101² (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 (2021220121901) 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, 336870020181 + ... + 336870020186.

It is an arithmetic number, because the mean of its divisors is an integer number (673740040368).

Almost surely, 2^{2021220121101} is an apocalyptic number.

It is an amenable number.

2021220121101 is a deficient number, since it is larger than the sum of its proper divisors (673740040371).

2021220121101 is an equidigital number, since it uses as much as digits as its factorization.

2021220121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673740040370.

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

Adding to 2021220121101 its reverse (1011210221202), we get a palindrome (3032430342303).

The spelling of 2021220121101 in words is "two trillion, twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred one".