121112355 has 64 divisors (see below), whose sum is σ = 241597440. Its totient is φ = 50443776.

The previous prime is 121112353. The next prime is 121112377. The reversal of 121112355 is 553211121.

It is not a de Polignac number, because 121112355 - 2¹ = 121112353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (121112351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 112761 + ... + 113829.

It is an arithmetic number, because the mean of its divisors is an integer number (3774960).

Almost surely, 2^121112355 is an apocalyptic number.

121112355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121112355 is a deficient number, since it is larger than the sum of its proper divisors (120485085).

121112355 is a wasteful number, since it uses less digits than its factorization.

121112355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180.

The product of its digits is 300, while the sum is 21.

The square root of 121112355 is about 11005.1058604631. The cubic root of 121112355 is about 494.7617872281.

Adding to 121112355 its reverse (553211121), we get a palindrome (674323476).

The spelling of 121112355 in words is "one hundred twenty-one million, one hundred twelve thousand, three hundred fifty-five".