223131124232021 has 4 divisors (see below), whose sum is σ = 223141321736844. Its totient is φ = 223120926727200.

The previous prime is 223131124231991. The next prime is 223131124232059. The reversal of 223131124232021 is 120232421131322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1008287098225 + 222122837133796 = 1004135^2 + 14903786^2 .

It is a cyclic number.

It is not a de Polignac number, because 223131124232021 - 2⁶ = 223131124231957 is a prime.

It is a super-3 number, since 3×223131124232021³ (a number of 44 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 (223131124235021) 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, 5098719590 + ... + 5098763351.

It is an arithmetic number, because the mean of its divisors is an integer number (55785330434211).

Almost surely, 2^{223131124232021} is an apocalyptic number.

It is an amenable number.

223131124232021 is a deficient number, since it is larger than the sum of its proper divisors (10197504823).

223131124232021 is a wasteful number, since it uses less digits than its factorization.

223131124232021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10197504822.

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 223131124232021 its reverse (120232421131322), we get a palindrome (343363545363343).

The spelling of 223131124232021 in words is "two hundred twenty-three trillion, one hundred thirty-one billion, one hundred twenty-four million, two hundred thirty-two thousand, twenty-one".