31301231001221 has 8 divisors (see below), whose sum is σ = 31543270012800. Its totient is φ = 31059432708480.

The previous prime is 31301231001211. The next prime is 31301231001233. The reversal of 31301231001221 is 12210013210313.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31301231001221 is a prime.

It is a super-2 number, since 2×31301231001221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31301231001193 and 31301231001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301231001211) 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, 59918636 + ... + 60438773.

It is an arithmetic number, because the mean of its divisors is an integer number (3942908751600).

Almost surely, 2^{31301231001221} is an apocalyptic number.

It is an amenable number.

31301231001221 is a deficient number, since it is larger than the sum of its proper divisors (242039011579).

31301231001221 is a wasteful number, since it uses less digits than its factorization.

31301231001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120359419.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31301231001221 its reverse (12210013210313), we get a palindrome (43511244211534).

The spelling of 31301231001221 in words is "thirty-one trillion, three hundred one billion, two hundred thirty-one million, one thousand, two hundred twenty-one".