131020121034 has 24 divisors (see below), whose sum is σ = 309683922912. Its totient is φ = 39703066920.

The previous prime is 131020121033. The next prime is 131020121047. The reversal of 131020121034 is 430121020131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131020120998 and 131020121016.

It is not an unprimeable number, because it can be changed into a prime (131020121033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330858694 + ... + 330859089.

It is an arithmetic number, because the mean of its divisors is an integer number (12903496788).

Almost surely, 2^131020121034 is an apocalyptic number.

131020121034 is an abundant number, since it is smaller than the sum of its proper divisors (178663801878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131020121034 is a wasteful number, since it uses less digits than its factorization.

131020121034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661717802 (or 661717799 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131020121034 its reverse (430121020131), we get a palindrome (561141141165).

The spelling of 131020121034 in words is "one hundred thirty-one billion, twenty million, one hundred twenty-one thousand, thirty-four".