121522541400 has 144 divisors (see below), whose sum is σ = 439506609360. Its totient is φ = 29913235200.

The previous prime is 121522541347. The next prime is 121522541419. The reversal of 121522541400 is 4145225121.

It is a happy number.

121522541400 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 2 + 254 + 1 + 400 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2573236 + ... + 2620035.

Almost surely, 2^121522541400 is an apocalyptic number.

121522541400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121522541400 is an abundant number, since it is smaller than the sum of its proper divisors (317984067960).

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

121522541400 is a wasteful number, since it uses less digits than its factorization.

121522541400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5193306 (or 5193294 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 121522541400 its reverse (4145225121), we get a palindrome (125667766521).

It can be divided in two parts, 12152 and 2541400, that added together give a palindrome (2553552).

The spelling of 121522541400 in words is "one hundred twenty-one billion, five hundred twenty-two million, five hundred forty-one thousand, four hundred".