121500554530 has 16 divisors (see below), whose sum is σ = 221158314360. Its totient is φ = 48054151552.

The previous prime is 121500554491. The next prime is 121500554533. The reversal of 121500554530 is 35455005121.

It can be written as a sum of positive squares in 4 ways, for example, as 85184010769 + 36316543761 = 291863^2 + 190569^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121500554492 and 121500554501.

It is not an unprimeable number, because it can be changed into a prime (121500554533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68257849 + ... + 68259628.

Almost surely, 2^121500554530 is an apocalyptic number.

121500554530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121500554530 is a deficient number, since it is larger than the sum of its proper divisors (99657759830).

121500554530 is a wasteful number, since it uses less digits than its factorization.

121500554530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136517573.

The product of its (nonzero) digits is 15000, while the sum is 31.

Adding to 121500554530 its reverse (35455005121), we get a palindrome (156955559651).

The spelling of 121500554530 in words is "one hundred twenty-one billion, five hundred million, five hundred fifty-four thousand, five hundred thirty".