1001111202102 has 64 divisors (see below), whose sum is σ = 2215083087360. Its totient is φ = 299109369600.

The previous prime is 1001111202083. The next prime is 1001111202127. The reversal of 1001111202102 is 2012021111001.

It is a super-2 number, since 2×1001111202102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1235202 + ... + 1878282.

It is an arithmetic number, because the mean of its divisors is an integer number (34610673240).

Almost surely, 2^{1001111202102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1001111202102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1107541543680).

1001111202102 is an abundant number, since it is smaller than the sum of its proper divisors (1213971885258).

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

1001111202102 is a wasteful number, since it uses less digits than its factorization.

1001111202102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643429.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1001111202102 its reverse (2012021111001), we get a palindrome (3013132313103).

The spelling of 1001111202102 in words is "one trillion, one billion, one hundred eleven million, two hundred two thousand, one hundred two".