102020012111220 has 192 divisors, whose sum is σ = 337031630831616. Its totient is φ = 22564194831360.

The previous prime is 102020012111107. The next prime is 102020012111231. The reversal of 102020012111220 is 22111210020201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 102020012111220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 121148139 + ... + 121987341.

It is an arithmetic number, because the mean of its divisors is an integer number (1755373077248).

Almost surely, 2^{102020012111220} is an apocalyptic number.

102020012111220 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 102020012111220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168515815415808).

102020012111220 is an abundant number, since it is smaller than the sum of its proper divisors (235011618720396).

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

102020012111220 is a wasteful number, since it uses less digits than its factorization.

102020012111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848590 (or 848588 counting only the distinct ones).

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

Adding to 102020012111220 its reverse (22111210020201), we get a palindrome (124131222131421).

The spelling of 102020012111220 in words is "one hundred two trillion, twenty billion, twelve million, one hundred eleven thousand, two hundred twenty".