1100157021 has 48 divisors (see below), whose sum is σ = 1710783360. Its totient is φ = 679916160.

The previous prime is 1100157017. The next prime is 1100157029. The reversal of 1100157021 is 1207510011.

It is a happy number.

It is not a de Polignac number, because 1100157021 - 2² = 1100157017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100156985 and 1100157003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100157029) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 683800 + ... + 685406.

It is an arithmetic number, because the mean of its divisors is an integer number (35641320).

Almost surely, 2^1100157021 is an apocalyptic number.

It is an amenable number.

1100157021 is a deficient number, since it is larger than the sum of its proper divisors (610626339).

1100157021 is a wasteful number, since it uses less digits than its factorization.

1100157021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746 (or 1743 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 1100157021 is about 33168.6149997253. The cubic root of 1100157021 is about 1032.3292311970.

Adding to 1100157021 its reverse (1207510011), we get a palindrome (2307667032).

The spelling of 1100157021 in words is "one billion, one hundred million, one hundred fifty-seven thousand, twenty-one".