1201001221964 has 12 divisors (see below), whose sum is σ = 2106252681624. Its totient is φ = 599214741504.

The previous prime is 1201001221963. The next prime is 1201001221997. The reversal of 1201001221964 is 4691221001021.

It is not an unprimeable number, because it can be changed into a prime (1201001221961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321465269 + ... + 321469004.

It is an arithmetic number, because the mean of its divisors is an integer number (175521056802).

Almost surely, 2^{1201001221964} is an apocalyptic number.

It is an amenable number.

1201001221964 is a deficient number, since it is larger than the sum of its proper divisors (905251459660).

1201001221964 is a wasteful number, since it uses less digits than its factorization.

1201001221964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642934744 (or 642934742 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 1201001221964 its reverse (4691221001021), we get a palindrome (5892222222985).

The spelling of 1201001221964 in words is "one trillion, two hundred one billion, one million, two hundred twenty-one thousand, nine hundred sixty-four".