21141302121 has 6 divisors (see below), whose sum is σ = 30537436410. Its totient is φ = 14094201408.

The previous prime is 21141302113. The next prime is 21141302177. The reversal of 21141302121 is 12120314112.

21141302121 is a `hidden beast` number, since 211 + 413 + 0 + 21 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18891128025 + 2250174096 = 137445^2 + 47436^2 .

It is not a de Polignac number, because 21141302121 - 2³ = 21141302113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21141302094 and 21141302103.

It is not an unprimeable number, because it can be changed into a prime (21141302111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174516776 + ... + 1174516793.

It is an arithmetic number, because the mean of its divisors is an integer number (5089572735).

Almost surely, 2^21141302121 is an apocalyptic number.

It is an amenable number.

21141302121 is a deficient number, since it is larger than the sum of its proper divisors (9396134289).

21141302121 is a wasteful number, since it uses less digits than its factorization.

21141302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349033575 (or 2349033572 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21141302121 its reverse (12120314112), we get a palindrome (33261616233).

The spelling of 21141302121 in words is "twenty-one billion, one hundred forty-one million, three hundred two thousand, one hundred twenty-one".