121263313477 has 4 divisors (see below), whose sum is σ = 121272522336. Its totient is φ = 121254104620.

The previous prime is 121263313463. The next prime is 121263313481. The reversal of 121263313477 is 774313362121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121263313477 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 (121263313177) 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, 4584649 + ... + 4611022.

It is an arithmetic number, because the mean of its divisors is an integer number (30318130584).

Almost surely, 2^121263313477 is an apocalyptic number.

It is an amenable number.

121263313477 is a deficient number, since it is larger than the sum of its proper divisors (9208859).

121263313477 is an equidigital number, since it uses as much as digits as its factorization.

121263313477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9208858.

The product of its digits is 127008, while the sum is 40.

Adding to 121263313477 its reverse (774313362121), we get a palindrome (895576675598).

The spelling of 121263313477 in words is "one hundred twenty-one billion, two hundred sixty-three million, three hundred thirteen thousand, four hundred seventy-seven".