102011002120020 has 384 divisors, whose sum is σ = 360839730585600. Its totient is φ = 20994596333568.

The previous prime is 102011002119991. The next prime is 102011002120031. The reversal of 102011002120020 is 20021200110201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 102011002119978 and 102011002120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27045726 + ... + 30585834.

It is an arithmetic number, because the mean of its divisors is an integer number (939686798400).

Almost surely, 2^{102011002120020} is an apocalyptic number.

102011002120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102011002120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180419865292800).

102011002120020 is an abundant number, since it is smaller than the sum of its proper divisors (258828728465580).

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

102011002120020 is a wasteful number, since it uses less digits than its factorization.

102011002120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540327 (or 3540325 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102011002120020 its reverse (20021200110201), we get a palindrome (122032202230221).

The spelling of 102011002120020 in words is "one hundred two trillion, eleven billion, two million, one hundred twenty thousand, twenty".