1101102021 has 12 divisors (see below), whose sum is σ = 1591820620. Its totient is φ = 733449600.

The previous prime is 1101101993. The next prime is 1101102049. The reversal of 1101102021 is 1202011011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1101101993) and next prime (1101102049).

It can be written as a sum of positive squares in 2 ways, for example, as 80299521 + 1020802500 = 8961^2 + 31950^2 .

It is not a de Polignac number, because 1101102021 - 2⁷ = 1101101893 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 = 1101101994 and 1101102012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101104021) 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, 40126 + ... + 61743.

Almost surely, 2^1101102021 is an apocalyptic number.

It is an amenable number.

1101102021 is a deficient number, since it is larger than the sum of its proper divisors (490718599).

1101102021 is a wasteful number, since it uses less digits than its factorization.

1101102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103076 (or 103073 counting only the distinct ones).

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

The square root of 1101102021 is about 33182.8573362813. The cubic root of 1101102021 is about 1032.6247259659.

Adding to 1101102021 its reverse (1202011011), we get a palindrome (2303113032).

The spelling of 1101102021 in words is "one billion, one hundred one million, one hundred two thousand, twenty-one".