221001211120011 has 64 divisors (see below), whose sum is σ = 343526541754368. Its totient is φ = 123774639625728.

The previous prime is 221001211119979. The next prime is 221001211120021. The reversal of 221001211120011 is 110021112100122.

It is a happy number.

It is not a de Polignac number, because 221001211120011 - 2⁵ = 221001211119979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221001211120021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6682207971 + ... + 6682241043.

It is an arithmetic number, because the mean of its divisors is an integer number (5367602214912).

Almost surely, 2^{221001211120011} is an apocalyptic number.

221001211120011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

221001211120011 is a deficient number, since it is larger than the sum of its proper divisors (122525330634357).

221001211120011 is a wasteful number, since it uses less digits than its factorization.

221001211120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63480.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221001211120011 its reverse (110021112100122), we get a palindrome (331022323220133).

The spelling of 221001211120011 in words is "two hundred twenty-one trillion, one billion, two hundred eleven million, one hundred twenty thousand, eleven".