121109501 has 2 divisors, whose sum is σ = 121109502. Its totient is φ = 121109500.

The previous prime is 121109441. The next prime is 121109561. The reversal of 121109501 is 105901121.

It is a balanced prime because it is at equal distance from previous prime (121109441) and next prime (121109561).

It can be written as a sum of positive squares in only one way, i.e., 109725625 + 11383876 = 10475^2 + 3374^2 .

It is an emirp because it is prime and its reverse (105901121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121109501 - 2¹⁸ = 120847357 is a prime.

It is a super-2 number, since 2×121109501² = 29335022464938002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121109561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60554750 + 60554751.

It is an arithmetic number, because the mean of its divisors is an integer number (60554751).

Almost surely, 2^121109501 is an apocalyptic number.

It is an amenable number.

121109501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121109501 is an equidigital number, since it uses as much as digits as its factorization.

121109501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 121109501 is about 11004.9761926140. The cubic root of 121109501 is about 494.7579008610.

The spelling of 121109501 in words is "one hundred twenty-one million, one hundred nine thousand, five hundred one".