1221151422041 has 8 divisors (see below), whose sum is σ = 1228798222464. Its totient is φ = 1213524510480.

The previous prime is 1221151421999. The next prime is 1221151422061. The reversal of 1221151422041 is 1402241511221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221151422041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221151422041.

It is not an unprimeable number, because it can be changed into a prime (1221151422061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4849025 + ... + 5094638.

It is an arithmetic number, because the mean of its divisors is an integer number (153599777808).

Almost surely, 2^{1221151422041} is an apocalyptic number.

It is an amenable number.

1221151422041 is a deficient number, since it is larger than the sum of its proper divisors (7646800423).

1221151422041 is an equidigital number, since it uses as much as digits as its factorization.

1221151422041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9944431.

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 1221151422041 its reverse (1402241511221), we get a palindrome (2623392933262).

The spelling of 1221151422041 in words is "one trillion, two hundred twenty-one billion, one hundred fifty-one million, four hundred twenty-two thousand, forty-one".