121671650 has 12 divisors (see below), whose sum is σ = 226309362. Its totient is φ = 48668640.

The previous prime is 121671647. The next prime is 121671653. The reversal of 121671650 is 56176121.

It is an interprime number because it is at equal distance from previous prime (121671647) and next prime (121671653).

It can be written as a sum of positive squares in 3 ways, for example, as 55785961 + 65885689 = 7469^2 + 8117^2 .

It is a hoax number, since the sum of its digits (29) 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 (121671653) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1216667 + ... + 1216766.

Almost surely, 2^121671650 is an apocalyptic number.

121671650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121671650 is a deficient number, since it is larger than the sum of its proper divisors (104637712).

121671650 is a wasteful number, since it uses less digits than its factorization.

121671650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433445 (or 2433440 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 121671650 is about 11030.4872965794. The cubic root of 121671650 is about 495.5222186577.

The spelling of 121671650 in words is "one hundred twenty-one million, six hundred seventy-one thousand, six hundred fifty".