1201220221012 has 18 divisors (see below), whose sum is σ = 2445341164602. Its totient is φ = 514808666064.

The previous prime is 1201220220979. The next prime is 1201220221037. The reversal of 1201220221012 is 2101220221021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1184344652176 + 16875568836 = 1088276^2 + 129906^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3064337103 + ... + 3064337494.

Almost surely, 2^{1201220221012} is an apocalyptic number.

It is an amenable number.

1201220221012 is an abundant number, since it is smaller than the sum of its proper divisors (1244120943590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201220221012 is a wasteful number, since it uses less digits than its factorization.

1201220221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6128674615 (or 6128674606 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1201220221012 its reverse (2101220221021), we get a palindrome (3302440442033).

Subtracting 1201220221012 from its reverse (2101220221021), we obtain a palindrome (900000000009).

The spelling of 1201220221012 in words is "one trillion, two hundred one billion, two hundred twenty million, two hundred twenty-one thousand, twelve".