121022521 has 2 divisors, whose sum is σ = 121022522. Its totient is φ = 121022520.

The previous prime is 121022513. The next prime is 121022557. The reversal of 121022521 is 125220121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120890025 + 132496 = 10995^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022521 - 2³ = 121022513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121022495 and 121022504.

It is not a weakly prime, because it can be changed into another prime (121022581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511260 + 60511261.

It is an arithmetic number, because the mean of its divisors is an integer number (60511261).

Almost surely, 2^121022521 is an apocalyptic number.

It is an amenable number.

121022521 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022521 is an equidigital number, since it uses as much as digits as its factorization.

121022521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 121022521 is about 11001.0236341897. The cubic root of 121022521 is about 494.6394286018.

Adding to 121022521 its reverse (125220121), we get a palindrome (246242642).

The spelling of 121022521 in words is "one hundred twenty-one million, twenty-two thousand, five hundred twenty-one".