1021021233221 has 32 divisors (see below), whose sum is σ = 1137710036736. Its totient is φ = 908550720000.

The previous prime is 1021021233151. The next prime is 1021021233241. The reversal of 1021021233221 is 1223321201201.

It is not a de Polignac number, because 1021021233221 - 2¹⁰ = 1021021232197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021021233193 and 1021021233202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021021233241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70597931 + ... + 70612391.

It is an arithmetic number, because the mean of its divisors is an integer number (35553438648).

Almost surely, 2^{1021021233221} is an apocalyptic number.

1021021233221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021021233221 is a deficient number, since it is larger than the sum of its proper divisors (116688803515).

1021021233221 is a wasteful number, since it uses less digits than its factorization.

1021021233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15293.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1021021233221 its reverse (1223321201201), we get a palindrome (2244342434422).

The spelling of 1021021233221 in words is "one trillion, twenty-one billion, twenty-one million, two hundred thirty-three thousand, two hundred twenty-one".