1021222110020 has 24 divisors (see below), whose sum is σ = 2450933064384. Its totient is φ = 350133294816.

The previous prime is 1021222110017. The next prime is 1021222110023. The reversal of 1021222110020 is 200112221201.

It is an interprime number because it is at equal distance from previous prime (1021222110017) and next prime (1021222110023).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 1021222109977 and 1021222110004.

It is not an unprimeable number, because it can be changed into a prime (1021222110023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3647221682 + ... + 3647221961.

It is an arithmetic number, because the mean of its divisors is an integer number (102122211016).

Almost surely, 2^{1021222110020} is an apocalyptic number.

1021222110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021222110020 is an abundant number, since it is smaller than the sum of its proper divisors (1429710954364).

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

1021222110020 is a wasteful number, since it uses less digits than its factorization.

1021222110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7294443659 (or 7294443657 counting only the distinct ones).

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

Adding to 1021222110020 its reverse (200112221201), we get a palindrome (1221334331221).

The spelling of 1021222110020 in words is "one trillion, twenty-one billion, two hundred twenty-two million, one hundred ten thousand, twenty".