1021010022221 has 48 divisors (see below), whose sum is σ = 1212312954240. Its totient is φ = 857255011200.

The previous prime is 1021010022211. The next prime is 1021010022223. The reversal of 1021010022221 is 1222200101201.

It is not a de Polignac number, because 1021010022221 - 2⁶ = 1021010022157 is a prime.

It is a super-2 number, since 2×1021010022221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1021010022196 and 1021010022205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021010022223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184728560 + ... + 184734086.

It is an arithmetic number, because the mean of its divisors is an integer number (25256519880).

Almost surely, 2^{1021010022221} is an apocalyptic number.

It is an amenable number.

1021010022221 is a deficient number, since it is larger than the sum of its proper divisors (191302932019).

1021010022221 is a wasteful number, since it uses less digits than its factorization.

1021010022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034 (or 6027 counting only the distinct ones).

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

Adding to 1021010022221 its reverse (1222200101201), we get a palindrome (2243210123422).

The spelling of 1021010022221 in words is "one trillion, twenty-one billion, ten million, twenty-two thousand, two hundred twenty-one".