10111021002 has 12 divisors (see below), whose sum is σ = 21907212210. Its totient is φ = 3370340328.

The previous prime is 10111020991. The next prime is 10111021003. The reversal of 10111021002 is 20012011101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8841452841 + 1269568161 = 94029^2 + 35631^2 .

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 (10111021003) 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, 280861677 + ... + 280861712.

Almost surely, 2^10111021002 is an apocalyptic number.

10111021002 is an abundant number, since it is smaller than the sum of its proper divisors (11796191208).

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

10111021002 is a wasteful number, since it uses less digits than its factorization.

10111021002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561723397 (or 561723394 counting only the distinct ones).

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

Adding to 10111021002 its reverse (20012011101), we get a palindrome (30123032103).

Subtracting 10111021002 from its reverse (20012011101), we obtain a palindrome (9900990099).

The spelling of 10111021002 in words is "ten billion, one hundred eleven million, twenty-one thousand, two".