2211001011 has 24 divisors (see below), whose sum is σ = 3393630864. Its totient is φ = 1382330880.

The previous prime is 2211001007. The next prime is 2211001031. The reversal of 2211001011 is 1101001122.

It is a happy number.

It is not a de Polignac number, because 2211001011 - 2² = 2211001007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2211000984 and 2211001002.

It is not an unprimeable number, because it can be changed into a prime (2211001031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17280 + ... + 68706.

It is an arithmetic number, because the mean of its divisors is an integer number (141401286).

Almost surely, 2^2211001011 is an apocalyptic number.

2211001011 is a deficient number, since it is larger than the sum of its proper divisors (1182629853).

2211001011 is a wasteful number, since it uses less digits than its factorization.

2211001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51731 (or 51728 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2211001011 is about 47021.2825324874. The cubic root of 2211001011 is about 1302.7556950765.

Adding to 2211001011 its reverse (1101001122), we get a palindrome (3312002133).

It can be divided in two parts, 221100 and 1011, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 2211001011 in words is "two billion, two hundred eleven million, one thousand, eleven".