121663412 has 12 divisors (see below), whose sum is σ = 229288836. Its totient is φ = 56152320.

The previous prime is 121663393. The next prime is 121663427. The reversal of 121663412 is 214366121.

It can be written as a sum of positive squares in 2 ways, for example, as 13586596 + 108076816 = 3686^2 + 10396^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1169789 + ... + 1169892.

It is an arithmetic number, because the mean of its divisors is an integer number (19107403).

Almost surely, 2^121663412 is an apocalyptic number.

It is an amenable number.

121663412 is a deficient number, since it is larger than the sum of its proper divisors (107625424).

121663412 is a wasteful number, since it uses less digits than its factorization.

121663412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339698 (or 2339696 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 121663412 is about 11030.1138706724. The cubic root of 121663412 is about 495.5110349947.

The spelling of 121663412 in words is "one hundred twenty-one million, six hundred sixty-three thousand, four hundred twelve".