1220100002000 has 160 divisors (see below), whose sum is σ = 3247934976000. Its totient is φ = 439601472000.

The previous prime is 1220100001987. The next prime is 1220100002083. The reversal of 1220100002000 is 2000010221.

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

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, 2143601 + ... + 2652399.

It is an arithmetic number, because the mean of its divisors is an integer number (20299593600).

Almost surely, 2^{1220100002000} is an apocalyptic number.

1220100002000 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 1220100002000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1623967488000).

1220100002000 is an abundant number, since it is smaller than the sum of its proper divisors (2027834974000).

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

1220100002000 is a wasteful number, since it uses less digits than its factorization.

1220100002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508942 (or 508926 counting only the distinct ones).

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

Adding to 1220100002000 its reverse (2000010221), we get a palindrome (1222100012221).

The spelling of 1220100002000 in words is "one trillion, two hundred twenty billion, one hundred million, two thousand".