2021103121 has 8 divisors (see below), whose sum is σ = 2035232064. Its totient is φ = 2007002640.

The previous prime is 2021103107. The next prime is 2021103137. The reversal of 2021103121 is 1213011202.

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 2021103121 - 2¹⁵ = 2021070353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021103221) 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, 146866 + ... + 160036.

It is an arithmetic number, because the mean of its divisors is an integer number (254404008).

Almost surely, 2^2021103121 is an apocalyptic number.

It is an amenable number.

2021103121 is a deficient number, since it is larger than the sum of its proper divisors (14128943).

2021103121 is a wasteful number, since it uses less digits than its factorization.

2021103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14231.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2021103121 is about 44956.6804935596. The cubic root of 2021103121 is about 1264.3369323661.

Adding to 2021103121 its reverse (1213011202), we get a palindrome (3234114323).

The spelling of 2021103121 in words is "two billion, twenty-one million, one hundred three thousand, one hundred twenty-one".