121243776 has 32 divisors (see below), whose sum is σ = 322054800. Its totient is φ = 40414464.

The previous prime is 121243757. The next prime is 121243777. The reversal of 121243776 is 677342121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (121243777) 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, 157486 + ... + 158253.

Almost surely, 2^121243776 is an apocalyptic number.

121243776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121243776 is an abundant number, since it is smaller than the sum of its proper divisors (200811024).

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

121243776 is an equidigital number, since it uses as much as digits as its factorization.

121243776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315756 (or 315744 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 121243776 is about 11011.0751518641. The cubic root of 121243776 is about 494.9406805765.

Adding to 121243776 its reverse (677342121), we get a palindrome (798585897).

The spelling of 121243776 in words is "one hundred twenty-one million, two hundred forty-three thousand, seven hundred seventy-six".