220400021042 has 16 divisors (see below), whose sum is σ = 332660155392. Its totient is φ = 109515381360.

The previous prime is 220400021027. The next prime is 220400021047. The reversal of 220400021042 is 240120004022.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 220400021042.

It is not an unprimeable number, because it can be changed into a prime (220400021047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307184 + ... + 731547.

It is an arithmetic number, because the mean of its divisors is an integer number (20791259712).

Almost surely, 2^220400021042 is an apocalyptic number.

220400021042 is a deficient number, since it is larger than the sum of its proper divisors (112260134350).

220400021042 is a wasteful number, since it uses less digits than its factorization.

220400021042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039393.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 220400021042 its reverse (240120004022), we get a palindrome (460520025064).

The spelling of 220400021042 in words is "two hundred twenty billion, four hundred million, twenty-one thousand, forty-two".