221142422001 has 16 divisors (see below), whose sum is σ = 297009495680. Its totient is φ = 146353132800.

The previous prime is 221142421987. The next prime is 221142422003. The reversal of 221142422001 is 100224241122.

It is not a de Polignac number, because 221142422001 - 2²¹ = 221140324849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221142422003) 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, 510591 + ... + 838443.

It is an arithmetic number, because the mean of its divisors is an integer number (18563093480).

Almost surely, 2^221142422001 is an apocalyptic number.

It is an amenable number.

221142422001 is a deficient number, since it is larger than the sum of its proper divisors (75867073679).

221142422001 is a wasteful number, since it uses less digits than its factorization.

221142422001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329496.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221142422001 its reverse (100224241122), we get a palindrome (321366663123).

The spelling of 221142422001 in words is "two hundred twenty-one billion, one hundred forty-two million, four hundred twenty-two thousand, one".