1220020011020 has 24 divisors (see below), whose sum is σ = 2569299947424. Its totient is φ = 486625542656.

The previous prime is 1220020011011. The next prime is 1220020011029. The reversal of 1220020011020 is 201100200221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1220020011011) and next prime (1220020011029).

It is a junction number, because it is equal to n+sod(n) for n = 1220020010992 and 1220020011010.

It is not an unprimeable number, because it can be changed into a prime (1220020011029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86396624 + ... + 86410743.

It is an arithmetic number, because the mean of its divisors is an integer number (107054164476).

Almost surely, 2^{1220020011020} is an apocalyptic number.

1220020011020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220020011020 is an abundant number, since it is smaller than the sum of its proper divisors (1349279936404).

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

1220020011020 is a wasteful number, since it uses less digits than its factorization.

1220020011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172807729 (or 172807727 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1220020011020 its reverse (201100200221), we get a palindrome (1421120211241).

The spelling of 1220020011020 in words is "one trillion, two hundred twenty billion, twenty million, eleven thousand, twenty".