1020020311220 has 48 divisors (see below), whose sum is σ = 2242603964160. Its totient is φ = 389192608896.

The previous prime is 1020020311213. The next prime is 1020020311231. The reversal of 1020020311220 is 221130200201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020311195 and 1020020311204.

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, 10546172 + ... + 10642451.

It is an arithmetic number, because the mean of its divisors is an integer number (46720915920).

Almost surely, 2^{1020020311220} is an apocalyptic number.

1020020311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020020311220 is an abundant number, since it is smaller than the sum of its proper divisors (1222583652940).

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

1020020311220 is a wasteful number, since it uses less digits than its factorization.

1020020311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21188744 (or 21188742 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1020020311220 its reverse (221130200201), we get a palindrome (1241150511421).

The spelling of 1020020311220 in words is "one trillion, twenty billion, twenty million, three hundred eleven thousand, two hundred twenty".