121289061 has 4 divisors (see below), whose sum is σ = 161718752. Its totient is φ = 80859372.

The previous prime is 121289059. The next prime is 121289099. The reversal of 121289061 is 160982121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 160982121 = 3 ⋅53660707.

It is not a de Polignac number, because 121289061 - 2¹ = 121289059 is a prime.

It is a super-2 number, since 2×121289061² = 29422072636523442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121289041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20214841 + ... + 20214846.

It is an arithmetic number, because the mean of its divisors is an integer number (40429688).

Almost surely, 2^121289061 is an apocalyptic number.

It is an amenable number.

121289061 is a deficient number, since it is larger than the sum of its proper divisors (40429691).

121289061 is an equidigital number, since it uses as much as digits as its factorization.

121289061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40429690.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 121289061 is about 11013.1312985908. The cubic root of 121289061 is about 495.0022936329.

The spelling of 121289061 in words is "one hundred twenty-one million, two hundred eighty-nine thousand, sixty-one".