1220022055018 has 16 divisors (see below), whose sum is σ = 1971244859976. Its totient is φ = 562961387520.

The previous prime is 1220022055013. The next prime is 1220022055019. The reversal of 1220022055018 is 8105502200221.

It can be written as a sum of positive squares in 4 ways, for example, as 847454648329 + 372567406689 = 920573^2 + 610383^2 .

It is not an unprimeable number, because it can be changed into a prime (1220022055013) 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, 5119371 + ... + 5352382.

Almost surely, 2^{1220022055018} is an apocalyptic number.

1220022055018 is a deficient number, since it is larger than the sum of its proper divisors (751222804958).

1220022055018 is a wasteful number, since it uses less digits than its factorization.

1220022055018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10476249.

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 1220022055018 its reverse (8105502200221), we get a palindrome (9325524255239).

The spelling of 1220022055018 in words is "one trillion, two hundred twenty billion, twenty-two million, fifty-five thousand, eighteen".