1011220211020 has 24 divisors (see below), whose sum is σ = 2124625903344. Its totient is φ = 404285520576.

The previous prime is 1011220211009. The next prime is 1011220211039. The reversal of 1011220211020 is 201120221101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12619302 + ... + 12699181.

It is an arithmetic number, because the mean of its divisors is an integer number (88526079306).

Almost surely, 2^{1011220211020} is an apocalyptic number.

1011220211020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011220211020 is an abundant number, since it is smaller than the sum of its proper divisors (1113405692324).

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

1011220211020 is a wasteful number, since it uses less digits than its factorization.

1011220211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25320489 (or 25320487 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1011220211020 its reverse (201120221101), we get a palindrome (1212340432121).

The spelling of 1011220211020 in words is "one trillion, eleven billion, two hundred twenty million, two hundred eleven thousand, twenty".