2111221220001 has 16 divisors (see below), whose sum is σ = 2958275204544. Its totient is φ = 1337593328064.

The previous prime is 2111221219979. The next prime is 2111221220041. The reversal of 2111221220001 is 1000221221112.

It is not a de Polignac number, because 2111221220001 - 2⁹ = 2111221219489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111221220041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221158146 + ... + 221167691.

It is an arithmetic number, because the mean of its divisors is an integer number (184892200284).

Almost surely, 2^{2111221220001} is an apocalyptic number.

It is an amenable number.

2111221220001 is a deficient number, since it is larger than the sum of its proper divisors (847053984543).

2111221220001 is a wasteful number, since it uses less digits than its factorization.

2111221220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442325920.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2111221220001 its reverse (1000221221112), we get a palindrome (3111442441113).

The spelling of 2111221220001 in words is "two trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one".