1201221220001 has 8 divisors (see below), whose sum is σ = 1310731317504. Its totient is φ = 1091762483920.

The previous prime is 1201221219839. The next prime is 1201221220027. The reversal of 1201221220001 is 1000221221021.

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 1201221220001 - 2¹⁸ = 1201220957857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201221220051) 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, 12791441 + ... + 12885006.

It is an arithmetic number, because the mean of its divisors is an integer number (163841414688).

Almost surely, 2^{1201221220001} is an apocalyptic number.

1201221220001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201221220001 is a deficient number, since it is larger than the sum of its proper divisors (109510097503).

1201221220001 is a wasteful number, since it uses less digits than its factorization.

1201221220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25680711.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1201221220001 its reverse (1000221221021), we get a palindrome (2201442441022).

The spelling of 1201221220001 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty thousand, one".