1000001022220 has 96 divisors (see below), whose sum is σ = 2153210713920. Its totient is φ = 390003609600.

The previous prime is 1000001022217. The next prime is 1000001022227. The reversal of 1000001022220 is 222201000001.

It is a super-5 number, since 5×1000001022220⁵ (a number of 61 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1000001022197 and 1000001022206.

It is not an unprimeable number, because it can be changed into a prime (1000001022227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100710216 + ... + 100720144.

It is an arithmetic number, because the mean of its divisors is an integer number (22429278270).

Almost surely, 2^{1000001022220} is an apocalyptic number.

1000001022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000001022220 is an abundant number, since it is smaller than the sum of its proper divisors (1153209691700).

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

1000001022220 is a wasteful number, since it uses less digits than its factorization.

1000001022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10795 (or 10793 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 1000001022220 its reverse (222201000001), we get a palindrome (1222202022221).

The spelling of 1000001022220 in words is "one trillion, one million, twenty-two thousand, two hundred twenty".