220111001001 has 48 divisors (see below), whose sum is σ = 337871592448. Its totient is φ = 137838153600.

The previous prime is 220111000999. The next prime is 220111001003. The reversal of 220111001001 is 100100111022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (220111000999) and next prime (220111001003).

It is not a de Polignac number, because 220111001001 - 2¹ = 220111000999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220111001003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4320660 + ... + 4371306.

Almost surely, 2^220111001001 is an apocalyptic number.

It is an amenable number.

220111001001 is a deficient number, since it is larger than the sum of its proper divisors (117760591447).

220111001001 is a wasteful number, since it uses less digits than its factorization.

220111001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51142 (or 51139 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 220111001001 its reverse (100100111022), we get a palindrome (320211112023).

The spelling of 220111001001 in words is "two hundred twenty billion, one hundred eleven million, one thousand, one".