20421220024001 has 8 divisors (see below), whose sum is σ = 20611802962944. Its totient is φ = 20231102490480.

The previous prime is 20421220023973. The next prime is 20421220024003. The reversal of 20421220024001 is 10042002212402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20421220024001 - 2⁶ = 20421220023937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20421220024003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116263190 + ... + 116438703.

It is an arithmetic number, because the mean of its divisors is an integer number (2576475370368).

Almost surely, 2^{20421220024001} is an apocalyptic number.

It is an amenable number.

20421220024001 is a deficient number, since it is larger than the sum of its proper divisors (190582938943).

20421220024001 is a wasteful number, since it uses less digits than its factorization.

20421220024001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232702711.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20421220024001 its reverse (10042002212402), we get a palindrome (30463222236403).

The spelling of 20421220024001 in words is "twenty trillion, four hundred twenty-one billion, two hundred twenty million, twenty-four thousand, one".