121051397 has 2 divisors, whose sum is σ = 121051398. Its totient is φ = 121051396.

The previous prime is 121051391. The next prime is 121051439. The reversal of 121051397 is 793150121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100020001 + 21031396 = 10001^2 + 4586^2 .

It is a cyclic number.

It is not a de Polignac number, because 121051397 - 2¹² = 121047301 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 (121051391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60525698 + 60525699.

It is an arithmetic number, because the mean of its divisors is an integer number (60525699).

Almost surely, 2^121051397 is an apocalyptic number.

It is an amenable number.

121051397 is a deficient number, since it is larger than the sum of its proper divisors (1).

121051397 is an equidigital number, since it uses as much as digits as its factorization.

121051397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 121051397 is about 11002.3359792364. The cubic root of 121051397 is about 494.6787658320.

The spelling of 121051397 in words is "one hundred twenty-one million, fifty-one thousand, three hundred ninety-seven".