121554012036 has 12 divisors (see below), whose sum is σ = 283626028112. Its totient is φ = 40518004008.

The previous prime is 121554012023. The next prime is 121554012037. The reversal of 121554012036 is 630210455121.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 121554011994 and 121554012012.

It is not an unprimeable number, because it can be changed into a prime (121554012037) 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 3 ways as a sum of consecutive naturals, for example, 5064750490 + ... + 5064750513.

Almost surely, 2^121554012036 is an apocalyptic number.

It is an amenable number.

121554012036 is an abundant number, since it is smaller than the sum of its proper divisors (162072016076).

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

121554012036 is a wasteful number, since it uses less digits than its factorization.

121554012036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10129501010 (or 10129501008 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 121554012036 its reverse (630210455121), we get a palindrome (751764467157).

The spelling of 121554012036 in words is "one hundred twenty-one billion, five hundred fifty-four million, twelve thousand, thirty-six".