1021002112220 has 24 divisors (see below), whose sum is σ = 2144242122624. Its totient is φ = 408374618816.

The previous prime is 1021002112213. The next prime is 1021002112321. The reversal of 1021002112220 is 222112001201.

It is a junction number, because it is equal to n+sod(n) for n = 1021002112195 and 1021002112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318367 + ... + 1944246.

It is an arithmetic number, because the mean of its divisors is an integer number (89343421776).

Almost surely, 2^{1021002112220} is an apocalyptic number.

1021002112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021002112220 is an abundant number, since it is smaller than the sum of its proper divisors (1123240010404).

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

1021002112220 is a wasteful number, since it uses less digits than its factorization.

1021002112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278269 (or 3278267 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1021002112220 its reverse (222112001201), we get a palindrome (1243114113421).

The spelling of 1021002112220 in words is "one trillion, twenty-one billion, two million, one hundred twelve thousand, two hundred twenty".