121139201 has 2 divisors, whose sum is σ = 121139202. Its totient is φ = 121139200.

The previous prime is 121139197. The next prime is 121139233. The reversal of 121139201 is 102931121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106584976 + 14554225 = 10324^2 + 3815^2 .

It is a cyclic number.

It is not a de Polignac number, because 121139201 - 2² = 121139197 is a prime.

It is a super-3 number, since 3×121139201³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121139281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60569600 + 60569601.

It is an arithmetic number, because the mean of its divisors is an integer number (60569601).

Almost surely, 2^121139201 is an apocalyptic number.

It is an amenable number.

121139201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121139201 is an equidigital number, since it uses as much as digits as its factorization.

121139201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 121139201 is about 11006.3254994571. The cubic root of 121139201 is about 494.7983411472.

The spelling of 121139201 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, two hundred one".