1011220001000 has 192 divisors, whose sum is σ = 2698497547200. Its totient is φ = 351726672000.

The previous prime is 1011220000963. The next prime is 1011220001017. The reversal of 1011220001000 is 1000221101.

1011220001000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5732111 + ... + 5905889.

It is an arithmetic number, because the mean of its divisors is an integer number (14054674725).

Almost surely, 2^{1011220001000} is an apocalyptic number.

1011220001000 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 1011220001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1349248773600).

1011220001000 is an abundant number, since it is smaller than the sum of its proper divisors (1687277546200).

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

1011220001000 is a wasteful number, since it uses less digits than its factorization.

1011220001000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173857 (or 173820 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1011220001000 its reverse (1000221101), we get a palindrome (1012220222101).

The spelling of 1011220001000 in words is "one trillion, eleven billion, two hundred twenty million, one thousand".