1021117112102 has 4 divisors (see below), whose sum is σ = 1531675668156. Its totient is φ = 510558556050.

The previous prime is 1021117112101. The next prime is 1021117112153. The reversal of 1021117112102 is 2012117111201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021117112101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255279278024 + ... + 255279278027.

It is an arithmetic number, because the mean of its divisors is an integer number (382918917039).

Almost surely, 2^{1021117112102} is an apocalyptic number.

1021117112102 is a deficient number, since it is larger than the sum of its proper divisors (510558556054).

1021117112102 is an equidigital number, since it uses as much as digits as its factorization.

1021117112102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510558556053.

The product of its (nonzero) digits is 56, while the sum is 20.

Subtracting 1021117112102 from its reverse (2012117111201), we obtain a palindrome (990999999099).

The spelling of 1021117112102 in words is "one trillion, twenty-one billion, one hundred seventeen million, one hundred twelve thousand, one hundred two".