121642130 has 16 divisors (see below), whose sum is σ = 219832704. Its totient is φ = 48462000.

The previous prime is 121642111. The next prime is 121642139. The reversal of 121642130 is 31246121.

It is not an unprimeable number, because it can be changed into a prime (121642139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21722 + ... + 26741.

It is an arithmetic number, because the mean of its divisors is an integer number (13739544).

Almost surely, 2^121642130 is an apocalyptic number.

121642130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121642130 is a deficient number, since it is larger than the sum of its proper divisors (98190574).

121642130 is a wasteful number, since it uses less digits than its factorization.

121642130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48721.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 121642130 is about 11029.1491058921. The cubic root of 121642130 is about 495.4821408497.

Adding to 121642130 its reverse (31246121), we get a palindrome (152888251).

The spelling of 121642130 in words is "one hundred twenty-one million, six hundred forty-two thousand, one hundred thirty".