1201221111005 has 8 divisors (see below), whose sum is σ = 1441471272192. Its totient is φ = 960972929488.

The previous prime is 1201221110993. The next prime is 1201221111011. The reversal of 1201221111005 is 5001111221021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201221111005 - 2⁶ = 1201221110941 is a prime.

It is a super-2 number, since 2×1201221111005² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

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, 1850192 + ... + 2413638.

It is an arithmetic number, because the mean of its divisors is an integer number (180183909024).

Almost surely, 2^{1201221111005} is an apocalyptic number.

It is an amenable number.

1201221111005 is a deficient number, since it is larger than the sum of its proper divisors (240250161187).

1201221111005 is an equidigital number, since it uses as much as digits as its factorization.

1201221111005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989835.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 1201221111005 its reverse (5001111221021), we get a palindrome (6202332332026).

The spelling of 1201221111005 in words is "one trillion, two hundred one billion, two hundred twenty-one million, one hundred eleven thousand, five".