31201201121 has 8 divisors (see below), whose sum is σ = 32076090624. Its totient is φ = 30335104800.

The previous prime is 31201201117. The next prime is 31201201183. The reversal of 31201201121 is 12110210213.

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 31201201121 - 2² = 31201201117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31201201096 and 31201201105.

It is not an unprimeable number, because it can be changed into a prime (31201201111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2191100 + ... + 2205293.

It is an arithmetic number, because the mean of its divisors is an integer number (4009511328).

Almost surely, 2^31201201121 is an apocalyptic number.

It is an amenable number.

31201201121 is a deficient number, since it is larger than the sum of its proper divisors (874889503).

31201201121 is a wasteful number, since it uses less digits than its factorization.

31201201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396591.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 31201201121 its reverse (12110210213), we get a palindrome (43311411334).

The spelling of 31201201121 in words is "thirty-one billion, two hundred one million, two hundred one thousand, one hundred twenty-one".