21435354242041 has 16 divisors (see below), whose sum is σ = 22809499017984. Its totient is φ = 20101420905984.

The previous prime is 21435354241999. The next prime is 21435354242047. The reversal of 21435354242041 is 14024245353412.

It is a cyclic number.

It is not a de Polignac number, because 21435354242041 - 2¹³ = 21435354233849 is a prime.

It is a super-2 number, since 2×21435354242041² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21435354241985 and 21435354242003.

It is not an unprimeable number, because it can be changed into a prime (21435354242047) 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, 37943376 + ... + 38504161.

It is an arithmetic number, because the mean of its divisors is an integer number (1425593688624).

Almost surely, 2^{21435354242041} is an apocalyptic number.

It is an amenable number.

21435354242041 is a deficient number, since it is larger than the sum of its proper divisors (1374144775943).

21435354242041 is a wasteful number, since it uses less digits than its factorization.

21435354242041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76447800.

The product of its (nonzero) digits is 460800, while the sum is 40.

Adding to 21435354242041 its reverse (14024245353412), we get a palindrome (35459599595453).

The spelling of 21435354242041 in words is "twenty-one trillion, four hundred thirty-five billion, three hundred fifty-four million, two hundred forty-two thousand, forty-one".