121541477 has 4 divisors (see below), whose sum is σ = 121582476. Its totient is φ = 121500480.

The previous prime is 121541471. The next prime is 121541489. The reversal of 121541477 is 774145121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105493441 + 16048036 = 10271^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 121541477 - 2¹⁴ = 121525093 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 (121541471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15674 + ... + 22107.

It is an arithmetic number, because the mean of its divisors is an integer number (30395619).

Almost surely, 2^121541477 is an apocalyptic number.

It is an amenable number.

121541477 is a deficient number, since it is larger than the sum of its proper divisors (40999).

121541477 is an equidigital number, since it uses as much as digits as its factorization.

121541477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40998.

The product of its digits is 7840, while the sum is 32.

The square root of 121541477 is about 11024.5851169103. The cubic root of 121541477 is about 495.3454406080.

Adding to 121541477 its reverse (774145121), we get a palindrome (895686598).

It can be divided in two parts, 12154 and 1477, that added together give a palindrome (13631).

The spelling of 121541477 in words is "one hundred twenty-one million, five hundred forty-one thousand, four hundred seventy-seven".