1100205421 has 32 divisors (see below), whose sum is σ = 1306368000. Its totient is φ = 907287360.

The previous prime is 1100205419. The next prime is 1100205443. The reversal of 1100205421 is 1245020011.

It is not a de Polignac number, because 1100205421 - 2¹ = 1100205419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100205395 and 1100205404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100205461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6146310 + ... + 6146488.

It is an arithmetic number, because the mean of its divisors is an integer number (40824000).

Almost surely, 2^1100205421 is an apocalyptic number.

It is an amenable number.

1100205421 is a deficient number, since it is larger than the sum of its proper divisors (206162579).

1100205421 is a wasteful number, since it uses less digits than its factorization.

1100205421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1100205421 is about 33169.3445970824. The cubic root of 1100205421 is about 1032.3443696427.

Adding to 1100205421 its reverse (1245020011), we get a palindrome (2345225432).

The spelling of 1100205421 in words is "one billion, one hundred million, two hundred five thousand, four hundred twenty-one".