1111021101 has 12 divisors (see below), whose sum is σ = 1605756828. Its totient is φ = 740242944.

The previous prime is 1111021099. The next prime is 1111021103. The reversal of 1111021101 is 1011201111.

It is an interprime number because it is at equal distance from previous prime (1111021099) and next prime (1111021103).

It can be written as a sum of positive squares in 2 ways, for example, as 656691876 + 454329225 = 25626^2 + 21315^2 .

It is not a de Polignac number, because 1111021101 - 2¹ = 1111021099 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 (1111021103) 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, 20020 + ... + 51213.

It is an arithmetic number, because the mean of its divisors is an integer number (133813069).

Almost surely, 2^1111021101 is an apocalyptic number.

It is an amenable number.

1111021101 is a deficient number, since it is larger than the sum of its proper divisors (494735727).

1111021101 is a wasteful number, since it uses less digits than its factorization.

1111021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72972 (or 72969 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

The square root of 1111021101 is about 33331.9831543219. The cubic root of 1111021101 is about 1035.7161996617.

Adding to 1111021101 its reverse (1011201111), we get a palindrome (2122222212).

The spelling of 1111021101 in words is "one billion, one hundred eleven million, twenty-one thousand, one hundred one".