1002021111010 has 16 divisors (see below), whose sum is σ = 1803817879416. Its totient is φ = 400768471168.

The previous prime is 1002021110953. The next prime is 1002021111011. The reversal of 1002021111010 is 101111202001.

It can be written as a sum of positive squares in 4 ways, for example, as 692721625401 + 309299485609 = 832299^2 + 556147^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1002021111011) 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 7 ways as a sum of consecutive naturals, for example, 4891267 + ... + 5092006.

Almost surely, 2^{1002021111010} is an apocalyptic number.

1002021111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1002021111010 is a deficient number, since it is larger than the sum of its proper divisors (801796768406).

1002021111010 is a wasteful number, since it uses less digits than its factorization.

1002021111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9993317.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1002021111010 its reverse (101111202001), we get a palindrome (1103132313011).

Subtracting from 1002021111010 its reverse (101111202001), we obtain a palindrome (900909909009).

The spelling of 1002021111010 in words is "one trillion, two billion, twenty-one million, one hundred eleven thousand, ten".