1220011211020 has 72 divisors (see below), whose sum is σ = 2981931122016. Its totient is φ = 418062468096.

The previous prime is 1220011210981. The next prime is 1220011211053. The reversal of 1220011211020 is 201121100221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1473052 + ... + 2147068.

It is an arithmetic number, because the mean of its divisors is an integer number (41415710028).

Almost surely, 2^{1220011211020} is an apocalyptic number.

1220011211020 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 1220011211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490965561008).

1220011211020 is an abundant number, since it is smaller than the sum of its proper divisors (1761919910996).

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

1220011211020 is a wasteful number, since it uses less digits than its factorization.

1220011211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675887 (or 675878 counting only the distinct ones).

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

Adding to 1220011211020 its reverse (201121100221), we get a palindrome (1421132311241).

The spelling of 1220011211020 in words is "one trillion, two hundred twenty billion, eleven million, two hundred eleven thousand, twenty".