121820773 has 4 divisors (see below), whose sum is σ = 121853728. Its totient is φ = 121787820.

The previous prime is 121820771. The next prime is 121820779. The reversal of 121820773 is 377028121.

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 not a de Polignac number, because 121820773 - 2¹ = 121820771 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 (121820771) 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, 10113 + ... + 18598.

It is an arithmetic number, because the mean of its divisors is an integer number (30463432).

Almost surely, 2^121820773 is an apocalyptic number.

It is an amenable number.

121820773 is a deficient number, since it is larger than the sum of its proper divisors (32955).

121820773 is an equidigital number, since it uses as much as digits as its factorization.

121820773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32954.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 121820773 is about 11037.2448101870. The cubic root of 121820773 is about 495.7245763743.

Adding to 121820773 its reverse (377028121), we get a palindrome (498848894).

The spelling of 121820773 in words is "one hundred twenty-one million, eight hundred twenty thousand, seven hundred seventy-three".