1021013013220 has 48 divisors (see below), whose sum is σ = 2291919815808. Its totient is φ = 381120439040.

The previous prime is 1021013013131. The next prime is 1021013013233. The reversal of 1021013013220 is 223103101201.

It is a junction number, because it is equal to n+sod(n) for n = 1021013013194 and 1021013013203.

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, 27049354 + ... + 27087073.

It is an arithmetic number, because the mean of its divisors is an integer number (47748329496).

Almost surely, 2^{1021013013220} is an apocalyptic number.

1021013013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021013013220 is an abundant number, since it is smaller than the sum of its proper divisors (1270906802588).

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

1021013013220 is a wasteful number, since it uses less digits than its factorization.

1021013013220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54136500 (or 54136498 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1021013013220 its reverse (223103101201), we get a palindrome (1244116114421).

The spelling of 1021013013220 in words is "one trillion, twenty-one billion, thirteen million, thirteen thousand, two hundred twenty".