1011200101220 has 24 divisors (see below), whose sum is σ = 2126106751608. Its totient is φ = 403987366400.

The previous prime is 1011200101139. The next prime is 1011200101231. The reversal of 1011200101220 is 221010021101.

It can be written as a sum of positive squares in 4 ways, for example, as 1950812224 + 1009249288996 = 44168^2 + 1004614^2 .

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 7 ways as a sum of consecutive naturals, for example, 30775301 + ... + 30808140.

It is an arithmetic number, because the mean of its divisors is an integer number (88587781317).

Almost surely, 2^{1011200101220} is an apocalyptic number.

1011200101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011200101220 is an abundant number, since it is smaller than the sum of its proper divisors (1114906650388).

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

1011200101220 is a wasteful number, since it uses less digits than its factorization.

1011200101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61584271 (or 61584269 counting only the distinct ones).

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

Adding to 1011200101220 its reverse (221010021101), we get a palindrome (1232210122321).

The spelling of 1011200101220 in words is "one trillion, eleven billion, two hundred million, one hundred one thousand, two hundred twenty".