121210131 has 16 divisors (see below), whose sum is σ = 187833600. Its totient is φ = 68088288.

The previous prime is 121210081. The next prime is 121210157. The reversal of 121210131 is 131012121.

It is not a de Polignac number, because 121210131 - 2¹⁰ = 121209107 is a prime.

It is a super-2 number, since 2×121210131² = 29383791714074322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121210181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47676 + ... + 50153.

It is an arithmetic number, because the mean of its divisors is an integer number (11739600).

Almost surely, 2^121210131 is an apocalyptic number.

121210131 is a deficient number, since it is larger than the sum of its proper divisors (66623469).

121210131 is an equidigital number, since it uses as much as digits as its factorization.

121210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97898.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 121210131 is about 11009.5472658961. The cubic root of 121210131 is about 494.8948945293.

Adding to 121210131 its reverse (131012121), we get a palindrome (252222252).

The spelling of 121210131 in words is "one hundred twenty-one million, two hundred ten thousand, one hundred thirty-one".