121820747 has 2 divisors, whose sum is σ = 121820748. Its totient is φ = 121820746.

The previous prime is 121820711. The next prime is 121820771. The reversal of 121820747 is 747028121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121820747 - 2⁶ = 121820683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121820047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60910373 + 60910374.

It is an arithmetic number, because the mean of its divisors is an integer number (60910374).

Almost surely, 2^121820747 is an apocalyptic number.

121820747 is a deficient number, since it is larger than the sum of its proper divisors (1).

121820747 is an equidigital number, since it uses as much as digits as its factorization.

121820747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 121820747 is about 11037.2436323568. The cubic root of 121820747 is about 495.7245411071.

Adding to 121820747 its reverse (747028121), we get a palindrome (868848868).

The spelling of 121820747 in words is "one hundred twenty-one million, eight hundred twenty thousand, seven hundred forty-seven".