121340545554 has 16 divisors (see below), whose sum is σ = 243200756448. Its totient is φ = 40360237632.

The previous prime is 121340545517. The next prime is 121340545589. The reversal of 121340545554 is 455545043121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21649687 + ... + 21655290.

It is an arithmetic number, because the mean of its divisors is an integer number (15200047278).

Almost surely, 2^121340545554 is an apocalyptic number.

121340545554 is an abundant number, since it is smaller than the sum of its proper divisors (121860210894).

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

121340545554 is a wasteful number, since it uses less digits than its factorization.

121340545554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43305449.

The product of its (nonzero) digits is 240000, while the sum is 39.

Adding to 121340545554 its reverse (455545043121), we get a palindrome (576885588675).

The spelling of 121340545554 in words is "one hundred twenty-one billion, three hundred forty million, five hundred forty-five thousand, five hundred fifty-four".