2301231121021 has 6 divisors (see below), whose sum is σ = 2676942324510. Its totient is φ = 1972483817976.

The previous prime is 2301231121009. The next prime is 2301231121073. The reversal of 2301231121021 is 1201211321032.

It can be written as a sum of positive squares in only one way, i.e., 1887189062500 + 414042058521 = 1373750^2 + 643461^2 .

It is not a de Polignac number, because 2301231121021 - 2⁹ = 2301231120509 is a prime.

It is a super-3 number, since 3×2301231121021³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2301231121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2301231121121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23481950166 + ... + 23481950263.

It is an arithmetic number, because the mean of its divisors is an integer number (446157054085).

Almost surely, 2^{2301231121021} is an apocalyptic number.

It is an amenable number.

2301231121021 is a deficient number, since it is larger than the sum of its proper divisors (375711203489).

2301231121021 is an equidigital number, since it uses as much as digits as its factorization.

2301231121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46963900443 (or 46963900436 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 2301231121021 its reverse (1201211321032), we get a palindrome (3502442442053).

The spelling of 2301231121021 in words is "two trillion, three hundred one billion, two hundred thirty-one million, one hundred twenty-one thousand, twenty-one".