131121230102 has 4 divisors (see below), whose sum is σ = 196681845156. Its totient is φ = 65560615050.

The previous prime is 131121230077. The next prime is 131121230167. The reversal of 131121230102 is 201032121131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201032121131 = 47 ⋅4277279173.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780307524 + ... + 32780307527.

It is an arithmetic number, because the mean of its divisors is an integer number (49170461289).

Almost surely, 2^131121230102 is an apocalyptic number.

131121230102 is a deficient number, since it is larger than the sum of its proper divisors (65560615054).

131121230102 is an equidigital number, since it uses as much as digits as its factorization.

131121230102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65560615053.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131121230102 its reverse (201032121131), we get a palindrome (332153351233).

The spelling of 131121230102 in words is "one hundred thirty-one billion, one hundred twenty-one million, two hundred thirty thousand, one hundred two".