2111020011 has 12 divisors (see below), whose sum is σ = 3050701888. Its totient is φ = 1406677104.

The previous prime is 2111020007. The next prime is 2111020019. The reversal of 2111020011 is 1100201112.

It is a happy number.

It is not a de Polignac number, because 2111020011 - 2² = 2111020007 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111019975 and 2111020002.

It is not an unprimeable number, because it can be changed into a prime (2111020019) 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, 35440 + ... + 74013.

Almost surely, 2^2111020011 is an apocalyptic number.

2111020011 is a deficient number, since it is larger than the sum of its proper divisors (939681877).

2111020011 is a wasteful number, since it uses less digits than its factorization.

2111020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111602 (or 111599 counting only the distinct ones).

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

The square root of 2111020011 is about 45945.8377984339. The cubic root of 2111020011 is about 1282.8152575875.

Adding to 2111020011 its reverse (1100201112), we get a palindrome (3211221123).

The spelling of 2111020011 in words is "two billion, one hundred eleven million, twenty thousand, eleven".