1001020111220 has 96 divisors (see below), whose sum is σ = 2149045668000. Its totient is φ = 391595212800.

The previous prime is 1001020111219. The next prime is 1001020111249. The reversal of 1001020111220 is 221110201001.

1001020111220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 131400450064 + 869619661156 = 362492^2 + 932534^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63910190 + ... + 63925850.

It is an arithmetic number, because the mean of its divisors is an integer number (22385892375).

Almost surely, 2^{1001020111220} is an apocalyptic number.

1001020111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001020111220 is an abundant number, since it is smaller than the sum of its proper divisors (1148025556780).

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

1001020111220 is a wasteful number, since it uses less digits than its factorization.

1001020111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16149 (or 16147 counting only the distinct ones).

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

Adding to 1001020111220 its reverse (221110201001), we get a palindrome (1222130312221).

The spelling of 1001020111220 in words is "one trillion, one billion, twenty million, one hundred eleven thousand, two hundred twenty".