221020020222001 has 64 divisors (see below), whose sum is σ = 300240271650816. Its totient is φ = 157113631584000.

The previous prime is 221020020221953. The next prime is 221020020222031. The reversal of 221020020222001 is 100222020020122.

It is not a de Polignac number, because 221020020222001 - 2¹¹ = 221020020219953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221020020222031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53303956 + ... + 57300538.

It is an arithmetic number, because the mean of its divisors is an integer number (4691254244544).

Almost surely, 2^{221020020222001} is an apocalyptic number.

It is an amenable number.

221020020222001 is a deficient number, since it is larger than the sum of its proper divisors (79220251428815).

221020020222001 is a wasteful number, since it uses less digits than its factorization.

221020020222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997262.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221020020222001 its reverse (100222020020122), we get a palindrome (321242040242123).

The spelling of 221020020222001 in words is "two hundred twenty-one trillion, twenty billion, twenty million, two hundred twenty-two thousand, one".