31031002311221 has 8 divisors (see below), whose sum is σ = 35633686864800. Its totient is φ = 26725265148240.

The previous prime is 31031002311163. The next prime is 31031002311233. The reversal of 31031002311221 is 12211320013013.

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 not a de Polignac number, because 31031002311221 - 2³⁰ = 31029928569397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31031002311193 and 31031002311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031002310221) 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, 74236847426 + ... + 74236847843.

It is an arithmetic number, because the mean of its divisors is an integer number (4454210858100).

Almost surely, 2^{31031002311221} is an apocalyptic number.

It is an amenable number.

31031002311221 is a deficient number, since it is larger than the sum of its proper divisors (4602684553579).

31031002311221 is a wasteful number, since it uses less digits than its factorization.

31031002311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148473695299.

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

Adding to 31031002311221 its reverse (12211320013013), we get a palindrome (43242322324234).

The spelling of 31031002311221 in words is "thirty-one trillion, thirty-one billion, two million, three hundred eleven thousand, two hundred twenty-one".