121139441 has 2 divisors, whose sum is σ = 121139442. Its totient is φ = 121139440.

The previous prime is 121139423. The next prime is 121139477. The reversal of 121139441 is 144931121.

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., 103958416 + 17181025 = 10196^2 + 4145^2 .

It is a cyclic number.

It is not a de Polignac number, because 121139441 - 2²² = 116945137 is a prime.

It is a super-3 number, since 3×121139441³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121139441.

It is not a weakly prime, because it can be changed into another prime (121139411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60569720 + 60569721.

It is an arithmetic number, because the mean of its divisors is an integer number (60569721).

Almost surely, 2^121139441 is an apocalyptic number.

It is an amenable number.

121139441 is a deficient number, since it is larger than the sum of its proper divisors (1).

121139441 is an equidigital number, since it uses as much as digits as its factorization.

121139441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 121139441 is about 11006.3364022730. The cubic root of 121139441 is about 494.7986679104.

The spelling of 121139441 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, four hundred forty-one".