121220104 has 16 divisors (see below), whose sum is σ = 227447100. Its totient is φ = 60567552.

The previous prime is 121220101. The next prime is 121220107. The reversal of 121220104 is 401022121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (121220101) and next prime (121220107).

It can be written as a sum of positive squares in 2 ways, for example, as 121220100 + 4 = 11010^2 + 2^2 .

It is a super-2 number, since 2×121220104² = 29388627227541632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121220101) 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, 9112 + ... + 18040.

Almost surely, 2^121220104 is an apocalyptic number.

It is an amenable number.

121220104 is a deficient number, since it is larger than the sum of its proper divisors (106226996).

121220104 is a wasteful number, since it uses less digits than its factorization.

121220104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10632 (or 10628 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 121220104 is about 11010.0001816530. Note that the first 3 decimals coincide. The cubic root of 121220104 is about 494.9084672436.

Adding to 121220104 its reverse (401022121), we get a palindrome (522242225).

It can be divided in two parts, 1212 and 20104, that added together give a square (21316 = 146²).

The spelling of 121220104 in words is "one hundred twenty-one million, two hundred twenty thousand, one hundred four".