1200001022212 has 6 divisors (see below), whose sum is σ = 2100001788878. Its totient is φ = 600000511104.

The previous prime is 1200001022177. The next prime is 1200001022219. The reversal of 1200001022212 is 2122201000021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 967653885636 + 232347136576 = 983694^2 + 482024^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1200001022192 and 1200001022201.

It is not an unprimeable number, because it can be changed into a prime (1200001022219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150000127773 + ... + 150000127780.

Almost surely, 2^{1200001022212} is an apocalyptic number.

It is an amenable number.

1200001022212 is a deficient number, since it is larger than the sum of its proper divisors (900000766666).

1200001022212 is a wasteful number, since it uses less digits than its factorization.

1200001022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300000255557 (or 300000255555 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1200001022212 its reverse (2122201000021), we get a palindrome (3322202022233).

The spelling of 1200001022212 in words is "one trillion, two hundred billion, one million, twenty-two thousand, two hundred twelve".