121408136 has 8 divisors (see below), whose sum is σ = 227640270. Its totient is φ = 60704064.

The previous prime is 121408127. The next prime is 121408139. The reversal of 121408136 is 631804121.

It can be written as a sum of positive squares in only one way, i.e., 119464900 + 1943236 = 10930^2 + 1394^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (121408139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7588001 + ... + 7588016.

Almost surely, 2^121408136 is an apocalyptic number.

It is an amenable number.

121408136 is a deficient number, since it is larger than the sum of its proper divisors (106232134).

121408136 is a wasteful number, since it uses less digits than its factorization.

121408136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15176023 (or 15176019 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 121408136 is about 11018.5360189092. The cubic root of 121408136 is about 495.1642294231.

The spelling of 121408136 in words is "one hundred twenty-one million, four hundred eight thousand, one hundred thirty-six".