1020111021200 has 60 divisors (see below), whose sum is σ = 2455297724400. Its totient is φ = 407298353280.

The previous prime is 1020111021199. The next prime is 1020111021239. The reversal of 1020111021200 is 21201110201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2112350 + ... + 2549949.

It is an arithmetic number, because the mean of its divisors is an integer number (40921628740).

Almost surely, 2^{1020111021200} is an apocalyptic number.

1020111021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020111021200 is an abundant number, since it is smaller than the sum of its proper divisors (1435186703200).

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

1020111021200 is a wasteful number, since it uses less digits than its factorization.

1020111021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662864 (or 4662853 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1020111021200 its reverse (21201110201), we get a palindrome (1041312131401).

It can be divided in two parts, 102011 and 1021200, that added together give a palindrome (1123211).

The spelling of 1020111021200 in words is "one trillion, twenty billion, one hundred eleven million, twenty-one thousand, two hundred".