121302131500 has 96 divisors (see below), whose sum is σ = 306008539200. Its totient is φ = 41515136000.

The previous prime is 121302131479. The next prime is 121302131521. The reversal of 121302131500 is 5131203121.

It is an interprime number because it is at equal distance from previous prime (121302131479) and next prime (121302131521).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 555175 + ... + 742174.

It is an arithmetic number, because the mean of its divisors is an integer number (3187588950).

Almost surely, 2^121302131500 is an apocalyptic number.

121302131500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121302131500 is an abundant number, since it is smaller than the sum of its proper divisors (184706407700).

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

121302131500 is a wasteful number, since it uses less digits than its factorization.

121302131500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297396 (or 1297384 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 121302131500 its reverse (5131203121), we get a palindrome (126433334621).

The spelling of 121302131500 in words is "one hundred twenty-one billion, three hundred two million, one hundred thirty-one thousand, five hundred".