1102011021 has 16 divisors (see below), whose sum is σ = 1667347200. Its totient is φ = 719041824.

The previous prime is 1102011007. The next prime is 1102011023. The reversal of 1102011021 is 1201102011.

It is a happy number.

It is not a de Polignac number, because 1102011021 - 2⁵ = 1102010989 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1102010994 and 1102011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1102011023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432936 + ... + 435473.

It is an arithmetic number, because the mean of its divisors is an integer number (104209200).

Almost surely, 2^1102011021 is an apocalyptic number.

It is an amenable number.

1102011021 is a deficient number, since it is larger than the sum of its proper divisors (565336179).

1102011021 is an equidigital number, since it uses as much as digits as its factorization.

1102011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868465 (or 868459 counting only the distinct ones).

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

The square root of 1102011021 is about 33196.5513419692. The cubic root of 1102011021 is about 1032.9088043039.

Adding to 1102011021 its reverse (1201102011), we get a palindrome (2303113032).

The spelling of 1102011021 in words is "one billion, one hundred two million, eleven thousand, twenty-one".