21144050114421 has 16 divisors (see below), whose sum is σ = 30374406711936. Its totient is φ = 13005843418176.

The previous prime is 21144050114419. The next prime is 21144050114431. The reversal of 21144050114421 is 12441105044112.

It is not a de Polignac number, because 21144050114421 - 2¹ = 21144050114419 is a prime.

It is a super-2 number, since 2×21144050114421² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144050114431) 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, 122406945 + ... + 122579558.

It is an arithmetic number, because the mean of its divisors is an integer number (1898400419496).

Almost surely, 2^{21144050114421} is an apocalyptic number.

It is an amenable number.

21144050114421 is a deficient number, since it is larger than the sum of its proper divisors (9230356597515).

21144050114421 is a wasteful number, since it uses less digits than its factorization.

21144050114421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244988732.

The product of its (nonzero) digits is 5120, while the sum is 30.

Adding to 21144050114421 its reverse (12441105044112), we get a palindrome (33585155158533).

The spelling of 21144050114421 in words is "twenty-one trillion, one hundred forty-four billion, fifty million, one hundred fourteen thousand, four hundred twenty-one".