121214638 has 8 divisors (see below), whose sum is σ = 181901088. Its totient is φ = 60580944.

The previous prime is 121214633. The next prime is 121214651. The reversal of 121214638 is 836412121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121214633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6831 + ... + 17002.

It is an arithmetic number, because the mean of its divisors is an integer number (22737636).

Almost surely, 2^121214638 is an apocalyptic number.

121214638 is a deficient number, since it is larger than the sum of its proper divisors (60686450).

121214638 is a wasteful number, since it uses less digits than its factorization.

121214638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26378.

The product of its digits is 2304, while the sum is 28.

The square root of 121214638 is about 11009.7519499760. The cubic root of 121214638 is about 494.9010284050.

Adding to 121214638 its reverse (836412121), we get a palindrome (957626759).

The spelling of 121214638 in words is "one hundred twenty-one million, two hundred fourteen thousand, six hundred thirty-eight".