1001220001211 has 8 divisors (see below), whose sum is σ = 1027705631040. Its totient is φ = 975051564808.

The previous prime is 1001220001181. The next prime is 1001220001217. The reversal of 1001220001211 is 1121000221001.

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 1001220001211 - 2¹⁸ = 1001219739067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001220001192 and 1001220001201.

It is not an unprimeable number, because it can be changed into a prime (1001220001217) 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, 79291961 + ... + 79304586.

It is an arithmetic number, because the mean of its divisors is an integer number (128463203880).

Almost surely, 2^{1001220001211} is an apocalyptic number.

1001220001211 is a deficient number, since it is larger than the sum of its proper divisors (26485629829).

1001220001211 is a wasteful number, since it uses less digits than its factorization.

1001220001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158596713.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001220001211 its reverse (1121000221001), we get a palindrome (2122220222212).

The spelling of 1001220001211 in words is "one trillion, one billion, two hundred twenty million, one thousand, two hundred eleven".