1021122100220 has 24 divisors (see below), whose sum is σ = 2144505426000. Its totient is φ = 408420456192.

The previous prime is 1021122100177. The next prime is 1021122100247. The reversal of 1021122100220 is 220012211201.

It is a junction number, because it is equal to n+sod(n) for n = 1021122100195 and 1021122100204.

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, 1477790 + ... + 2055749.

It is an arithmetic number, because the mean of its divisors is an integer number (89354392750).

Almost surely, 2^{1021122100220} is an apocalyptic number.

1021122100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021122100220 is an abundant number, since it is smaller than the sum of its proper divisors (1123383325780).

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

1021122100220 is a wasteful number, since it uses less digits than its factorization.

1021122100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547997 (or 3547995 counting only the distinct ones).

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

Adding to 1021122100220 its reverse (220012211201), we get a palindrome (1241134311421).

The spelling of 1021122100220 in words is "one trillion, twenty-one billion, one hundred twenty-two million, one hundred thousand, two hundred twenty".