1021210110220 has 24 divisors (see below), whose sum is σ = 2213719982208. Its totient is φ = 395307139200.

The previous prime is 1021210110187. The next prime is 1021210110223. The reversal of 1021210110220 is 220110121201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021210110220.

It is not an unprimeable number, because it can be changed into a prime (1021210110223) 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, 823555921 + ... + 823557160.

It is an arithmetic number, because the mean of its divisors is an integer number (92238332592).

Almost surely, 2^{1021210110220} is an apocalyptic number.

1021210110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021210110220 is an abundant number, since it is smaller than the sum of its proper divisors (1192509871988).

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

1021210110220 is a wasteful number, since it uses less digits than its factorization.

1021210110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647113121 (or 1647113119 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021210110220 its reverse (220110121201), we get a palindrome (1241320231421).

The spelling of 1021210110220 in words is "one trillion, twenty-one billion, two hundred ten million, one hundred ten thousand, two hundred twenty".