121521677 has 2 divisors, whose sum is σ = 121521678. Its totient is φ = 121521676.

The previous prime is 121521667. The next prime is 121521691. The reversal of 121521677 is 776125121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119006281 + 2515396 = 10909^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 121521677 - 2⁶ = 121521613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121521607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60760838 + 60760839.

It is an arithmetic number, because the mean of its divisors is an integer number (60760839).

Almost surely, 2^121521677 is an apocalyptic number.

It is an amenable number.

121521677 is a deficient number, since it is larger than the sum of its proper divisors (1).

121521677 is an equidigital number, since it uses as much as digits as its factorization.

121521677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The square root of 121521677 is about 11023.6870873587. The cubic root of 121521677 is about 495.3185406761.

Adding to 121521677 its reverse (776125121), we get a palindrome (897646798).

The spelling of 121521677 in words is "one hundred twenty-one million, five hundred twenty-one thousand, six hundred seventy-seven".