1201221211012 has 48 divisors (see below), whose sum is σ = 2240391772080. Its totient is φ = 561574121472.

The previous prime is 1201221211009. The next prime is 1201221211031. The reversal of 1201221211012 is 2101121221021.

It can be written as a sum of positive squares in 8 ways, for example, as 23245271296 + 1177975939716 = 152464^2 + 1085346^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110309664 + ... + 110320552.

It is an arithmetic number, because the mean of its divisors is an integer number (46674828585).

Almost surely, 2^{1201221211012} is an apocalyptic number.

It is an amenable number.

1201221211012 is a deficient number, since it is larger than the sum of its proper divisors (1039170561068).

1201221211012 is a wasteful number, since it uses less digits than its factorization.

1201221211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21400 (or 21398 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1201221211012 its reverse (2101121221021), we get a palindrome (3302342432033).

The spelling of 1201221211012 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred eleven thousand, twelve".