1220212112122 has 16 divisors (see below), whose sum is σ = 1938018512232. Its totient is φ = 574207221760.

The previous prime is 1220212112089. The next prime is 1220212112123. The reversal of 1220212112122 is 2212112120221.

It can be written as a sum of positive squares in 4 ways, for example, as 1012038012001 + 208174100121 = 1006001^2 + 456261^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1220212112122.

It is not an unprimeable number, because it can be changed into a prime (1220212112123) 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, 1821708 + ... + 2399800.

Almost surely, 2^{1220212112122} is an apocalyptic number.

1220212112122 is a deficient number, since it is larger than the sum of its proper divisors (717806400110).

1220212112122 is a wasteful number, since it uses less digits than its factorization.

1220212112122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640193.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1220212112122 its reverse (2212112120221), we get a palindrome (3432324232343).

It can be divided in two parts, 12202 and 12112122, that added together give a square (12124324 = 3482²).

The spelling of 1220212112122 in words is "one trillion, two hundred twenty billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-two".