1002121101 has 12 divisors (see below), whose sum is σ = 1451332480. Its totient is φ = 666315720.

The previous prime is 1002121067. The next prime is 1002121111. The reversal of 1002121101 is 1011212001.

It is a happy number.

It is not a de Polignac number, because 1002121101 - 2⁹ = 1002120589 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002121111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143485 + ... + 150306.

Almost surely, 2^1002121101 is an apocalyptic number.

It is an amenable number.

1002121101 is a deficient number, since it is larger than the sum of its proper divisors (449211379).

1002121101 is a wasteful number, since it uses less digits than its factorization.

1002121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294176 (or 294173 counting only the distinct ones).

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

The square root of 1002121101 is about 31656.2963879226. The cubic root of 1002121101 is about 1000.7065343583.

Adding to 1002121101 its reverse (1011212001), we get a palindrome (2013333102).

The spelling of 1002121101 in words is "one billion, two million, one hundred twenty-one thousand, one hundred one".