131121304505542 has 8 divisors (see below), whose sum is σ = 211811338047456. Its totient is φ = 60517525156392.

The previous prime is 131121304505507. The next prime is 131121304505591. The reversal of 131121304505542 is 245505403121131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2521563548158 + ... + 2521563548209.

It is an arithmetic number, because the mean of its divisors is an integer number (26476417255932).

Almost surely, 2^{131121304505542} is an apocalyptic number.

131121304505542 is a deficient number, since it is larger than the sum of its proper divisors (80690033541914).

131121304505542 is a wasteful number, since it uses less digits than its factorization.

131121304505542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043127096382.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 131121304505542 its reverse (245505403121131), we get a palindrome (376626707626673).

The spelling of 131121304505542 in words is "one hundred thirty-one trillion, one hundred twenty-one billion, three hundred four million, five hundred five thousand, five hundred forty-two".