220001221023 has 16 divisors (see below), whose sum is σ = 294179635200. Its totient is φ = 146245629600.

The previous prime is 220001221007. The next prime is 220001221031. The reversal of 220001221023 is 320122100022.

It is a happy number.

It is not a de Polignac number, because 220001221023 - 2⁴ = 220001221007 is a prime.

It is a super-2 number, since 2×220001221023² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220001220993 and 220001221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001221123) 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, 1778073 + ... + 1897773.

It is an arithmetic number, because the mean of its divisors is an integer number (18386227200).

Almost surely, 2^220001221023 is an apocalyptic number.

220001221023 is a deficient number, since it is larger than the sum of its proper divisors (74178414177).

220001221023 is a wasteful number, since it uses less digits than its factorization.

220001221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121462.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 220001221023 its reverse (320122100022), we get a palindrome (540123321045).

The spelling of 220001221023 in words is "two hundred twenty billion, one million, two hundred twenty-one thousand, twenty-three".