121631168 has 14 divisors (see below), whose sum is σ = 241361976. Its totient is φ = 60815552.

The previous prime is 121631137. The next prime is 121631171. The reversal of 121631168 is 861136121.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 121631168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950180 + ... + 950307.

Almost surely, 2^121631168 is an apocalyptic number.

It is an amenable number.

121631168 is a deficient number, since it is larger than the sum of its proper divisors (119730808).

121631168 is an equidigital number, since it uses as much as digits as its factorization.

121631168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900499 (or 1900489 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 121631168 is about 11028.6521388608. The cubic root of 121631168 is about 495.4672566469.

Adding to 121631168 its reverse (861136121), we get a palindrome (982767289).

It can be divided in two parts, 12163 and 1168, that added together give a palindrome (13331).

The spelling of 121631168 in words is "one hundred twenty-one million, six hundred thirty-one thousand, one hundred sixty-eight".