121505434552 has 24 divisors (see below), whose sum is σ = 229341785400. Its totient is φ = 60350290800.

The previous prime is 121505434543. The next prime is 121505434553. The reversal of 121505434552 is 255434505121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121505434553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 150652 + ... + 515467.

It is an arithmetic number, because the mean of its divisors is an integer number (9555907725).

Almost surely, 2^121505434552 is an apocalyptic number.

It is an amenable number.

121505434552 is a deficient number, since it is larger than the sum of its proper divisors (107836350848).

121505434552 is an equidigital number, since it uses as much as digits as its factorization.

121505434552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666427 (or 666272 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 121505434552 its reverse (255434505121), we get a palindrome (376939939673).

The spelling of 121505434552 in words is "one hundred twenty-one billion, five hundred five million, four hundred thirty-four thousand, five hundred fifty-two".