121432141 has 4 divisors (see below), whose sum is σ = 121553500. Its totient is φ = 121310784.

The previous prime is 121432123. The next prime is 121432147. The reversal of 121432141 is 141234121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58293225 + 63138916 = 7635^2 + 7946^2 .

It is a cyclic number.

It is not a de Polignac number, because 121432141 - 2¹³ = 121423949 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121432147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59166 + ... + 61183.

It is an arithmetic number, because the mean of its divisors is an integer number (30388375).

Almost surely, 2^121432141 is an apocalyptic number.

It is an amenable number.

121432141 is a deficient number, since it is larger than the sum of its proper divisors (121359).

121432141 is a wasteful number, since it uses less digits than its factorization.

121432141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121358.

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

The square root of 121432141 is about 11019.6252658609. The cubic root of 121432141 is about 495.1968621455.

Adding to 121432141 its reverse (141234121), we get a palindrome (262666262).

The spelling of 121432141 in words is "one hundred twenty-one million, four hundred thirty-two thousand, one hundred forty-one".