121427188 has 6 divisors (see below), whose sum is σ = 212497586. Its totient is φ = 60713592.

The previous prime is 121427171. The next prime is 121427191. The reversal of 121427188 is 881724121.

It can be written as a sum of positive squares in only one way, i.e., 110418064 + 11009124 = 10508^2 + 3318^2 .

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, 15178395 + ... + 15178402.

Almost surely, 2^121427188 is an apocalyptic number.

It is an amenable number.

121427188 is a deficient number, since it is larger than the sum of its proper divisors (91070398).

121427188 is a wasteful number, since it uses less digits than its factorization.

121427188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30356801 (or 30356799 counting only the distinct ones).

The product of its digits is 7168, while the sum is 34.

The square root of 121427188 is about 11019.4005281594. The cubic root of 121427188 is about 495.1901293223.

The spelling of 121427188 in words is "one hundred twenty-one million, four hundred twenty-seven thousand, one hundred eighty-eight".