1021111102102 has 32 divisors (see below), whose sum is σ = 1967090291712. Its totient is φ = 386392732704.

The previous prime is 1021111102093. The next prime is 1021111102177. The reversal of 1021111102102 is 2012011111201.

It is a happy number.

It is a super-2 number, since 2×1021111102102² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121963218 + ... + 121971589.

It is an arithmetic number, because the mean of its divisors is an integer number (61471571616).

Almost surely, 2^{1021111102102} is an apocalyptic number.

1021111102102 is a deficient number, since it is larger than the sum of its proper divisors (945979189610).

1021111102102 is a wasteful number, since it uses less digits than its factorization.

1021111102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243934852.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1021111102102 its reverse (2012011111201), we get a palindrome (3033122213303).

Subtracting 1021111102102 from its reverse (2012011111201), we obtain a palindrome (990900009099).

The spelling of 1021111102102 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred two thousand, one hundred two".