121131 has 12 divisors (see below), whose sum is σ = 179608. Its totient is φ = 78624.

The previous prime is 121123. The next prime is 121139. The reversal of 121131 is 131121.

121131 is nontrivially palindromic in base 8.

It is an interprime number because it is at equal distance from previous prime (121123) and next prime (121139).

It is not a de Polignac number, because 121131 - 2³ = 121123 is a prime.

It is a super-2 number, since 2×121131² = 29345438322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

121131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (121139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231 + ... + 543.

2¹²¹¹³¹ is an apocalyptic number.

121131 is a deficient number, since it is larger than the sum of its proper divisors (58477).

121131 is a wasteful number, since it uses less digits than its factorization.

121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 359 counting only the distinct ones).

The product of its digits is 6, while the sum is 9.

The square root of 121131 is about 348.0387909415. The cubic root of 121131 is about 49.4787175115.

Adding to 121131 its reverse (131121), we get a palindrome (252252).

It can be divided in two parts, 121 and 131, that multiplied together give a palindrome (15851).

The spelling of 121131 in words is "one hundred twenty-one thousand, one hundred thirty-one".