1100102121 has 64 divisors (see below), whose sum is σ = 1750602240. Its totient is φ = 681246720.

The previous prime is 1100102117. The next prime is 1100102161. The reversal of 1100102121 is 1212010011.

It is a happy number.

It is not a de Polignac number, because 1100102121 - 2² = 1100102117 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1100102161) 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, 4280425 + ... + 4280681.

It is an arithmetic number, because the mean of its divisors is an integer number (27353160).

Almost surely, 2^1100102121 is an apocalyptic number.

It is an amenable number.

1100102121 is a deficient number, since it is larger than the sum of its proper divisors (650500119).

1100102121 is a wasteful number, since it uses less digits than its factorization.

1100102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 457 counting only the distinct ones).

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

The square root of 1100102121 is about 33167.7873998252. The cubic root of 1100102121 is about 1032.3120591581.

Adding to 1100102121 its reverse (1212010011), we get a palindrome (2312112132).

The spelling of 1100102121 in words is "one billion, one hundred million, one hundred two thousand, one hundred twenty-one".