121727550 has 48 divisors (see below), whose sum is σ = 345013632. Its totient is φ = 27823200.

The previous prime is 121727549. The next prime is 121727579. The reversal of 121727550 is 55727121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56916 + ... + 59015.

It is an arithmetic number, because the mean of its divisors is an integer number (7187784).

Almost surely, 2^121727550 is an apocalyptic number.

121727550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121727550 is an abundant number, since it is smaller than the sum of its proper divisors (223286082).

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

121727550 is a wasteful number, since it uses less digits than its factorization.

121727550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115953 (or 115948 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 30.

The square root of 121727550 is about 11033.0208918501. The cubic root of 121727550 is about 495.5980934980.

The spelling of 121727550 in words is "one hundred twenty-one million, seven hundred twenty-seven thousand, five hundred fifty".