1105137021 has 4 divisors (see below), whose sum is σ = 1473516032. Its totient is φ = 736758012.

The previous prime is 1105136987. The next prime is 1105137041. The reversal of 1105137021 is 1207315011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1105137021 - 2¹⁸ = 1104874877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105137041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184189501 + ... + 184189506.

It is an arithmetic number, because the mean of its divisors is an integer number (368379008).

Almost surely, 2^1105137021 is an apocalyptic number.

It is an amenable number.

1105137021 is a deficient number, since it is larger than the sum of its proper divisors (368379011).

1105137021 is an equidigital number, since it uses as much as digits as its factorization.

1105137021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368379010.

The product of its (nonzero) digits is 210, while the sum is 21.

The square root of 1105137021 is about 33243.6012038407. The cubic root of 1105137021 is about 1033.8845430885.

The spelling of 1105137021 in words is "one billion, one hundred five million, one hundred thirty-seven thousand, twenty-one".