102111121021020 has 48 divisors (see below), whose sum is σ = 289827729814560. Its totient is φ = 26856623609856.

The previous prime is 102111121020989. The next prime is 102111121021027. The reversal of 102111121021020 is 20120121111201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111121021027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11656516285 + ... + 11656525044.

It is an arithmetic number, because the mean of its divisors is an integer number (6038077704470).

Almost surely, 2^{102111121021020} is an apocalyptic number.

102111121021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111121021020 is an abundant number, since it is smaller than the sum of its proper divisors (187716608793540).

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

102111121021020 is a wasteful number, since it uses less digits than its factorization.

102111121021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23313041414 (or 23313041412 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102111121021020 its reverse (20120121111201), we get a palindrome (122231242132221).

The spelling of 102111121021020 in words is "one hundred two trillion, one hundred eleven billion, one hundred twenty-one million, twenty-one thousand, twenty".