1020221110020 has 72 divisors (see below), whose sum is σ = 3323005910784. Its totient is φ = 233193395904.

The previous prime is 1020221109979. The next prime is 1020221110021. The reversal of 1020221110020 is 200111220201.

It is a super-2 number, since 2×1020221110020² (a number of 25 digits) contains 22 as substring.

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 = 1020221109978 and 1020221110005.

It is not an unprimeable number, because it can be changed into a prime (1020221110021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173504052 + ... + 173509931.

It is an arithmetic number, because the mean of its divisors is an integer number (46152859872).

Almost surely, 2^{1020221110020} is an apocalyptic number.

1020221110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020221110020 is an abundant number, since it is smaller than the sum of its proper divisors (2302784800764).

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

1020221110020 is a wasteful number, since it uses less digits than its factorization.

1020221110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347014009 (or 347014000 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020221110020 its reverse (200111220201), we get a palindrome (1220332330221).

The spelling of 1020221110020 in words is "one trillion, twenty billion, two hundred twenty-one million, one hundred ten thousand, twenty".