921201131333213 has 4 divisors (see below), whose sum is σ = 921201258632508. Its totient is φ = 921201004033920.

The previous prime is 921201131333137. The next prime is 921201131333233. The reversal of 921201131333213 is 312333131102129.

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 533911405149529 + 387289726183684 = 23106523^2 + 19679678^2 .

It is a cyclic number.

It is not a de Polignac number, because 921201131333213 - 2⁸ = 921201131332957 is a prime.

It is a super-2 number, since 2×921201131333213² (a number of 31 digits) contains 22 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 (921201131333233) 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, 52095806 + ... + 67500927.

It is an arithmetic number, because the mean of its divisors is an integer number (230300314658127).

Almost surely, 2^{921201131333213} is an apocalyptic number.

It is an amenable number.

921201131333213 is a deficient number, since it is larger than the sum of its proper divisors (127299295).

921201131333213 is a wasteful number, since it uses less digits than its factorization.

921201131333213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127299294.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 921201131333213 in words is "nine hundred twenty-one trillion, two hundred one billion, one hundred thirty-one million, three hundred thirty-three thousand, two hundred thirteen".