121027428 has 36 divisors (see below), whose sum is σ = 306371520. Its totient is φ = 40284336.

The previous prime is 121027427. The next prime is 121027429. The reversal of 121027428 is 824720121.

121027428 is a `hidden beast` number, since 1 + 210 + 27 + 428 = 666.

It is an interprime number because it is at equal distance from previous prime (121027427) and next prime (121027429).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (121027427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28201 + ... + 32207.

It is an arithmetic number, because the mean of its divisors is an integer number (8510320).

Almost surely, 2^121027428 is an apocalyptic number.

121027428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121027428 is an abundant number, since it is smaller than the sum of its proper divisors (185344092).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121027428 is a wasteful number, since it uses less digits than its factorization.

121027428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4856 (or 4851 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 121027428 is about 11001.2466566294. The cubic root of 121027428 is about 494.6461137566.

Adding to 121027428 its reverse (824720121), we get a palindrome (945747549).

The spelling of 121027428 in words is "one hundred twenty-one million, twenty-seven thousand, four hundred twenty-eight".