1220011100212 has 24 divisors (see below), whose sum is σ = 2260661497416. Its totient is φ = 574109488128.

The previous prime is 1220011100197. The next prime is 1220011100251. The reversal of 1220011100212 is 2120011100221.

It can be written as a sum of positive squares in 4 ways, for example, as 1014181928356 + 205829171856 = 1007066^2 + 453684^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220011100192 and 1220011100201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3115408 + ... + 3485080.

It is an arithmetic number, because the mean of its divisors is an integer number (94194229059).

Almost surely, 2^{1220011100212} is an apocalyptic number.

It is an amenable number.

1220011100212 is a deficient number, since it is larger than the sum of its proper divisors (1040650397204).

1220011100212 is a wasteful number, since it uses less digits than its factorization.

1220011100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418227 (or 418225 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1220011100212 its reverse (2120011100221), we get a palindrome (3340022200433).

Subtracting 1220011100212 from its reverse (2120011100221), we obtain a palindrome (900000000009).

The spelling of 1220011100212 in words is "one trillion, two hundred twenty billion, eleven million, one hundred thousand, two hundred twelve".