21421210142041 has 4 divisors (see below), whose sum is σ = 22548642254800. Its totient is φ = 20293778029284.

The previous prime is 21421210141993. The next prime is 21421210142069. The reversal of 21421210142041 is 14024101212412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21421210142041 - 2³¹ = 21419062658393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21421210141997 and 21421210142015.

It is not an unprimeable number, because it can be changed into a prime (21421210142081) 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, 563716056351 + ... + 563716056388.

It is an arithmetic number, because the mean of its divisors is an integer number (5637160563700).

Almost surely, 2^{21421210142041} is an apocalyptic number.

It is an amenable number.

21421210142041 is a deficient number, since it is larger than the sum of its proper divisors (1127432112759).

21421210142041 is a wasteful number, since it uses less digits than its factorization.

21421210142041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127432112758.

The product of its (nonzero) digits is 1024, while the sum is 25.

Adding to 21421210142041 its reverse (14024101212412), we get a palindrome (35445311354453).

The spelling of 21421210142041 in words is "twenty-one trillion, four hundred twenty-one billion, two hundred ten million, one hundred forty-two thousand, forty-one".