121302131501 has 4 divisors (see below), whose sum is σ = 122837601600. Its totient is φ = 119766661404.

The previous prime is 121302131479. The next prime is 121302131521. The reversal of 121302131501 is 105131203121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 105131203121 = 7 ⋅15018743303.

It is a cyclic number.

It is not a de Polignac number, because 121302131501 - 2²² = 121297937197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302131521) 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, 767734931 + ... + 767735088.

It is an arithmetic number, because the mean of its divisors is an integer number (30709400400).

Almost surely, 2^121302131501 is an apocalyptic number.

It is an amenable number.

121302131501 is a deficient number, since it is larger than the sum of its proper divisors (1535470099).

121302131501 is an equidigital number, since it uses as much as digits as its factorization.

121302131501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535470098.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 121302131501 its reverse (105131203121), we get a palindrome (226433334622).

The spelling of 121302131501 in words is "one hundred twenty-one billion, three hundred two million, one hundred thirty-one thousand, five hundred one".