1000221220020 has 48 divisors (see below), whose sum is σ = 3055221183168. Its totient is φ = 242477871360.

The previous prime is 1000221219997. The next prime is 1000221220043. The reversal of 1000221220020 is 200221220001.

1000221220020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1000221219997) and next prime (1000221220043).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1000221219978 and 1000221220005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757742689 + ... + 757744008.

It is an arithmetic number, because the mean of its divisors is an integer number (63650441316).

Almost surely, 2^{1000221220020} is an apocalyptic number.

1000221220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000221220020 is an abundant number, since it is smaller than the sum of its proper divisors (2054999963148).

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

1000221220020 is a wasteful number, since it uses less digits than its factorization.

1000221220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515486720 (or 1515486718 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1000221220020 its reverse (200221220001), we get a palindrome (1200442440021).

The spelling of 1000221220020 in words is "one trillion, two hundred twenty-one million, two hundred twenty thousand, twenty".