121401450554 has 16 divisors (see below), whose sum is σ = 185367591816. Its totient is φ = 59615265600.

The previous prime is 121401450503. The next prime is 121401450559. The reversal of 121401450554 is 455054104121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 79385880025 + 42015570529 = 281755^2 + 204977^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121401450554.

It is not an unprimeable number, because it can be changed into a prime (121401450559) 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, 672077 + ... + 833360.

Almost surely, 2^121401450554 is an apocalyptic number.

121401450554 is a deficient number, since it is larger than the sum of its proper divisors (63966141262).

121401450554 is a wasteful number, since it uses less digits than its factorization.

121401450554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506161.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 121401450554 its reverse (455054104121), we get a palindrome (576455554675).

The spelling of 121401450554 in words is "one hundred twenty-one billion, four hundred one million, four hundred fifty thousand, five hundred fifty-four".