121028636 has 12 divisors (see below), whose sum is σ = 215272680. Its totient is φ = 59522160.

The previous prime is 121028623. The next prime is 121028639. The reversal of 121028636 is 636820121.

It is a junction number, because it is equal to n+sod(n) for n = 121028599 and 121028608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121028639) 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, 247766 + ... + 248253.

It is an arithmetic number, because the mean of its divisors is an integer number (17939390).

Almost surely, 2^121028636 is an apocalyptic number.

It is an amenable number.

121028636 is a deficient number, since it is larger than the sum of its proper divisors (94244044).

121028636 is a wasteful number, since it uses less digits than its factorization.

121028636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496084 (or 496082 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 121028636 is about 11001.3015593611. The cubic root of 121028636 is about 494.6477594731.

Adding to 121028636 its reverse (636820121), we get a palindrome (757848757).

The spelling of 121028636 in words is "one hundred twenty-one million, twenty-eight thousand, six hundred thirty-six".