31120020200221 has 8 divisors (see below), whose sum is σ = 32564141486424. Its totient is φ = 29707637843520.

The previous prime is 31120020200207. The next prime is 31120020200237. The reversal of 31120020200221 is 12200202002113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24094795736025 + 7025224464196 = 4908645^2 + 2650514^2 .

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 31120020200221 - 2⁵ = 31120020200189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31120020200195 and 31120020200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120020200201) 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, 7934730370 + ... + 7934734291.

It is an arithmetic number, because the mean of its divisors is an integer number (4070517685803).

Almost surely, 2^{31120020200221} is an apocalyptic number.

It is an amenable number.

31120020200221 is a deficient number, since it is larger than the sum of its proper divisors (1444121286203).

31120020200221 is a wasteful number, since it uses less digits than its factorization.

31120020200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15869464751.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31120020200221 its reverse (12200202002113), we get a palindrome (43320222202334).

The spelling of 31120020200221 in words is "thirty-one trillion, one hundred twenty billion, twenty million, two hundred thousand, two hundred twenty-one".