1021102002 has 24 divisors (see below), whose sum is σ = 2215153980. Its totient is φ = 339941760.

The previous prime is 1021101959. The next prime is 1021102003. The reversal of 1021102002 is 2002011201.

It can be written as a sum of positive squares in 2 ways, for example, as 1019461041 + 1640961 = 31929^2 + 1281^2 .

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 (1021102003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20499 + ... + 49622.

Almost surely, 2^1021102002 is an apocalyptic number.

1021102002 is an abundant number, since it is smaller than the sum of its proper divisors (1194051978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021102002 is a wasteful number, since it uses less digits than its factorization.

1021102002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70938 (or 70935 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021102002 is about 31954.6866985111. The cubic root of 1021102002 is about 1006.9850955029.

Adding to 1021102002 its reverse (2002011201), we get a palindrome (3023113203).

The spelling of 1021102002 in words is "one billion, twenty-one million, one hundred two thousand, two".