2101021002 has 12 divisors (see below), whose sum is σ = 4552212210. Its totient is φ = 700340328.

The previous prime is 2101020923. The next prime is 2101021009. The reversal of 2101021002 is 2001201012.

2101021002 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2006950401 + 94070601 = 44799^2 + 9699^2 .

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 (2101021009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58361677 + ... + 58361712.

Almost surely, 2^2101021002 is an apocalyptic number.

2101021002 is an abundant number, since it is smaller than the sum of its proper divisors (2451191208).

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

2101021002 is a wasteful number, since it uses less digits than its factorization.

2101021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116723397 (or 116723394 counting only the distinct ones).

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

The square root of 2101021002 is about 45836.8956409572. The cubic root of 2101021002 is about 1280.7866669005.

Adding to 2101021002 its reverse (2001201012), we get a palindrome (4102222014).

The spelling of 2101021002 in words is "two billion, one hundred one million, twenty-one thousand, two".