1021100223 has 64 divisors (see below), whose sum is σ = 1782950400. Its totient is φ = 509276160.

The previous prime is 1021100209. The next prime is 1021100263. The reversal of 1021100223 is 3220011201.

It is not a de Polignac number, because 1021100223 - 2⁵ = 1021100191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021100199 and 1021100208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021100263) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134883 + ... + 142251.

It is an arithmetic number, because the mean of its divisors is an integer number (27858600).

Almost surely, 2^1021100223 is an apocalyptic number.

1021100223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1021100223 is a deficient number, since it is larger than the sum of its proper divisors (761850177).

1021100223 is a wasteful number, since it uses less digits than its factorization.

1021100223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7432.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1021100223 is about 31954.6588622066. The cubic root of 1021100223 is about 1006.9845107009.

Adding to 1021100223 its reverse (3220011201), we get a palindrome (4241111424).

The spelling of 1021100223 in words is "one billion, twenty-one million, one hundred thousand, two hundred twenty-three".