121019650 has 24 divisors (see below), whose sum is σ = 226016784. Its totient is φ = 48210000.

The previous prime is 121019641. The next prime is 121019671. The reversal of 121019650 is 56910121.

It is a super-2 number, since 2×121019650² = 29291511372245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7729 + ... + 17371.

It is an arithmetic number, because the mean of its divisors is an integer number (9417366).

Almost surely, 2^121019650 is an apocalyptic number.

121019650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121019650 is a deficient number, since it is larger than the sum of its proper divisors (104997134).

121019650 is a wasteful number, since it uses less digits than its factorization.

121019650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9906 (or 9901 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 121019650 is about 11000.8931455587. The cubic root of 121019650 is about 494.6355171507.

Adding to 121019650 its reverse (56910121), we get a palindrome (177929771).

The spelling of 121019650 in words is "one hundred twenty-one million, nineteen thousand, six hundred fifty".