1021012002220 has 24 divisors (see below), whose sum is σ = 2450428805664. Its totient is φ = 350061257856.

The previous prime is 1021012002217. The next prime is 1021012002229. The reversal of 1021012002220 is 222002101201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021012002220.

It is not an unprimeable number, because it can be changed into a prime (1021012002229) 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, 3646471297 + ... + 3646471576.

It is an arithmetic number, because the mean of its divisors is an integer number (102101200236).

Almost surely, 2^{1021012002220} is an apocalyptic number.

1021012002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021012002220 is an abundant number, since it is smaller than the sum of its proper divisors (1429416803444).

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

1021012002220 is a wasteful number, since it uses less digits than its factorization.

1021012002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7292942889 (or 7292942887 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1021012002220 its reverse (222002101201), we get a palindrome (1243014103421).

The spelling of 1021012002220 in words is "one trillion, twenty-one billion, twelve million, two thousand, two hundred twenty".