31242102121 has 8 divisors (see below), whose sum is σ = 33085857024. Its totient is φ = 29399012160.

The previous prime is 31242102107. The next prime is 31242102137. The reversal of 31242102121 is 12120124213.

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 31242102121 - 2¹¹ = 31242100073 is a prime.

It is a super-3 number, since 3×31242102121³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31242102181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67825 + ... + 259006.

It is an arithmetic number, because the mean of its divisors is an integer number (4135732128).

Almost surely, 2^31242102121 is an apocalyptic number.

It is an amenable number.

31242102121 is a deficient number, since it is larger than the sum of its proper divisors (1843754903).

31242102121 is a wasteful number, since it uses less digits than its factorization.

31242102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332471.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 31242102121 its reverse (12120124213), we get a palindrome (43362226334).

The spelling of 31242102121 in words is "thirty-one billion, two hundred forty-two million, one hundred two thousand, one hundred twenty-one".