21144120130 has 32 divisors (see below), whose sum is σ = 43504231680. Its totient is φ = 7248120000.

The previous prime is 21144120061. The next prime is 21144120131. The reversal of 21144120130 is 3102144112.

It is a junction number, because it is equal to n+sod(n) for n = 21144120098 and 21144120107.

It is not an unprimeable number, because it can be changed into a prime (21144120131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421380 + ... + 468880.

It is an arithmetic number, because the mean of its divisors is an integer number (1359507240).

Almost surely, 2^21144120130 is an apocalyptic number.

21144120130 is an abundant number, since it is smaller than the sum of its proper divisors (22360111550).

21144120130 is a wasteful number, since it uses less digits than its factorization.

21144120130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53874.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21144120130 its reverse (3102144112), we get a palindrome (24246264242).

The spelling of 21144120130 in words is "twenty-one billion, one hundred forty-four million, one hundred twenty thousand, one hundred thirty".