121778052 has 24 divisors (see below), whose sum is σ = 309980832. Its totient is φ = 36902400.

The previous prime is 121778003. The next prime is 121778053. The reversal of 121778052 is 250877121.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (121778053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461149 + ... + 461412.

It is an arithmetic number, because the mean of its divisors is an integer number (12915868).

Almost surely, 2^121778052 is an apocalyptic number.

121778052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121778052 is an abundant number, since it is smaller than the sum of its proper divisors (188202780).

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

121778052 is a wasteful number, since it uses less digits than its factorization.

121778052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922579 (or 922577 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 121778052 is about 11035.3093296020. The cubic root of 121778052 is about 495.6666214920. Note that the first 4 decimals are identical.

The spelling of 121778052 in words is "one hundred twenty-one million, seven hundred seventy-eight thousand, fifty-two".