121547122477 has 8 divisors (see below), whose sum is σ = 138361942080. Its totient is φ = 105693149760.

The previous prime is 121547122471. The next prime is 121547122493. The reversal of 121547122477 is 774221745121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121547122477 - 2³¹ = 119399638829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121547122471) 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, 240211452 + ... + 240211957.

It is an arithmetic number, because the mean of its divisors is an integer number (17295242760).

Almost surely, 2^121547122477 is an apocalyptic number.

It is an amenable number.

121547122477 is a deficient number, since it is larger than the sum of its proper divisors (16814819603).

121547122477 is a wasteful number, since it uses less digits than its factorization.

121547122477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480423443.

The product of its digits is 219520, while the sum is 43.

Adding to 121547122477 its reverse (774221745121), we get a palindrome (895768867598).

The spelling of 121547122477 in words is "one hundred twenty-one billion, five hundred forty-seven million, one hundred twenty-two thousand, four hundred seventy-seven".