121243210131 has 8 divisors (see below), whose sum is σ = 161748286720. Its totient is φ = 80783470152.

The previous prime is 121243210111. The next prime is 121243210157. The reversal of 121243210131 is 131012342121.

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

It is a de Polignac number, because none of the positive numbers 2^k-121243210131 is a prime.

It is a super-2 number, since 2×121243210131² (a number of 23 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 = 121243210098 and 121243210107.

It is not an unprimeable number, because it can be changed into a prime (121243210111) 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, 11327911 + ... + 11338608.

It is an arithmetic number, because the mean of its divisors is an integer number (20218535840).

Almost surely, 2^121243210131 is an apocalyptic number.

121243210131 is a deficient number, since it is larger than the sum of its proper divisors (40505076589).

121243210131 is a wasteful number, since it uses less digits than its factorization.

121243210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22668305.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 121243210131 its reverse (131012342121), we get a palindrome (252255552252).

The spelling of 121243210131 in words is "one hundred twenty-one billion, two hundred forty-three million, two hundred ten thousand, one hundred thirty-one".