2011021101 has 24 divisors (see below), whose sum is σ = 3076504704. Its totient is φ = 1312148160.

The previous prime is 2011021081. The next prime is 2011021121. The reversal of 2011021101 is 1011201102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2011021081) and next prime (2011021121).

It is not a de Polignac number, because 2011021101 - 2⁹ = 2011020589 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76620 + ... + 99461.

It is an arithmetic number, because the mean of its divisors is an integer number (128187696).

Almost surely, 2^2011021101 is an apocalyptic number.

It is an amenable number.

2011021101 is a deficient number, since it is larger than the sum of its proper divisors (1065483603).

2011021101 is an equidigital number, since it uses as much as digits as its factorization.

2011021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176143 (or 176131 counting only the distinct ones).

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

The square root of 2011021101 is about 44844.4099191861. The cubic root of 2011021101 is about 1262.2310980548.

Adding to 2011021101 its reverse (1011201102), we get a palindrome (3022222203).

The spelling of 2011021101 in words is "two billion, eleven million, twenty-one thousand, one hundred one".