122121541 has 2 divisors, whose sum is σ = 122121542. Its totient is φ = 122121540.

The previous prime is 122121539. The next prime is 122121547. The reversal of 122121541 is 145121221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90649441 + 31472100 = 9521^2 + 5610^2 .

It is a cyclic number.

It is not a de Polignac number, because 122121541 - 2¹ = 122121539 is a prime.

Together with 122121539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122121547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060770 + 61060771.

It is an arithmetic number, because the mean of its divisors is an integer number (61060771).

Almost surely, 2^122121541 is an apocalyptic number.

It is an amenable number.

122121541 is a deficient number, since it is larger than the sum of its proper divisors (1).

122121541 is an equidigital number, since it uses as much as digits as its factorization.

122121541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160, while the sum is 19.

The square root of 122121541 is about 11050.8615501236. The cubic root of 122121541 is about 496.1322122509.

Adding to 122121541 its reverse (145121221), we get a palindrome (267242762).

The spelling of 122121541 in words is "one hundred twenty-two million, one hundred twenty-one thousand, five hundred forty-one".