121368780 has 288 divisors, whose sum is σ = 439193664. Its totient is φ = 27869184.

The previous prime is 121368757. The next prime is 121368787. The reversal of 121368780 is 87863121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121368787) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1074004 + ... + 1074116.

It is an arithmetic number, because the mean of its divisors is an integer number (1524978).

Almost surely, 2^121368780 is an apocalyptic number.

121368780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121368780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219596832).

121368780 is an abundant number, since it is smaller than the sum of its proper divisors (317824884).

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

121368780 is a wasteful number, since it uses less digits than its factorization.

121368780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 121368780 is about 11016.7499744707. The cubic root of 121368780 is about 495.1107190347.

The spelling of 121368780 in words is "one hundred twenty-one million, three hundred sixty-eight thousand, seven hundred eighty".