220551211001 has 24 divisors (see below), whose sum is σ = 253197100800. Its totient is φ = 191607120320.

The previous prime is 220551210967. The next prime is 220551211009. The reversal of 220551211001 is 100112155022.

It is a de Polignac number, because none of the positive numbers 2^k-220551211001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220551211009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3033725 + ... + 3105573.

It is an arithmetic number, because the mean of its divisors is an integer number (10549879200).

Almost surely, 2^220551211001 is an apocalyptic number.

It is an amenable number.

220551211001 is a deficient number, since it is larger than the sum of its proper divisors (32645889799).

220551211001 is a wasteful number, since it uses less digits than its factorization.

220551211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72997 (or 72986 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

Adding to 220551211001 its reverse (100112155022), we get a palindrome (320663366023).

The spelling of 220551211001 in words is "two hundred twenty billion, five hundred fifty-one million, two hundred eleven thousand, one".