221100001211011 has 12 divisors (see below), whose sum is σ = 246036357721056. Its totient is φ = 197508685934160.

The previous prime is 221100001210969. The next prime is 221100001211017. The reversal of 221100001211011 is 110112100001122.

It is a happy number.

It is not a de Polignac number, because 221100001211011 - 2³⁷ = 220962562257539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221100001210982 and 221100001211000.

It is not an unprimeable number, because it can be changed into a prime (221100001211017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8848942971 + ... + 8848967956.

It is an arithmetic number, because the mean of its divisors is an integer number (20503029810088).

Almost surely, 2^{221100001211011} is an apocalyptic number.

221100001211011 is a deficient number, since it is larger than the sum of its proper divisors (24936356510045).

221100001211011 is a wasteful number, since it uses less digits than its factorization.

221100001211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17697911002 (or 17697910971 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221100001211011 its reverse (110112100001122), we get a palindrome (331212101212133).

The spelling of 221100001211011 in words is "two hundred twenty-one trillion, one hundred billion, one million, two hundred eleven thousand, eleven".