1220021423122 has 8 divisors (see below), whose sum is σ = 1937681083836. Its totient is φ = 574127728512.

The previous prime is 1220021423113. The next prime is 1220021423143. The reversal of 1220021423122 is 2213241200221.

It can be written as a sum of positive squares in 2 ways, for example, as 1190937872601 + 29083550521 = 1091301^2 + 170539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220021423093 and 1220021423102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17941491483 + ... + 17941491550.

Almost surely, 2^{1220021423122} is an apocalyptic number.

1220021423122 is a deficient number, since it is larger than the sum of its proper divisors (717659660714).

1220021423122 is a wasteful number, since it uses less digits than its factorization.

1220021423122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35882983052.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1220021423122 its reverse (2213241200221), we get a palindrome (3433262623343).

The spelling of 1220021423122 in words is "one trillion, two hundred twenty billion, twenty-one million, four hundred twenty-three thousand, one hundred twenty-two".