102111202120020 has 96 divisors (see below), whose sum is σ = 293682839184000. Its totient is φ = 26489734838784.

The previous prime is 102111202120019. The next prime is 102111202120021. The reversal of 102111202120020 is 20021202111201.

It is an interprime number because it is at equal distance from previous prime (102111202120019) and next prime (102111202120021).

It is a super-3 number, since 3×102111202120020³ (a number of 43 digits) contains 333 as substring.

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 (102111202120021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11329306 + ... + 18236654.

It is an arithmetic number, because the mean of its divisors is an integer number (3059196241500).

Almost surely, 2^{102111202120020} is an apocalyptic number.

102111202120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111202120020 is an abundant number, since it is smaller than the sum of its proper divisors (191571637063980).

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

102111202120020 is a wasteful number, since it uses less digits than its factorization.

102111202120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6914057 (or 6914055 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102111202120020 its reverse (20021202111201), we get a palindrome (122132404231221).

The spelling of 102111202120020 in words is "one hundred two trillion, one hundred eleven billion, two hundred two million, one hundred twenty thousand, twenty".