1021011202221 has 16 divisors (see below), whose sum is σ = 1384141825920. Its totient is φ = 669285040320.

The previous prime is 1021011202193. The next prime is 1021011202259. The reversal of 1021011202221 is 1222021101201.

It is not a de Polignac number, because 1021011202221 - 2⁷ = 1021011202093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021011202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021011200221) 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 15 ways as a sum of consecutive naturals, for example, 426625 + ... + 1491318.

It is an arithmetic number, because the mean of its divisors is an integer number (86508864120).

Almost surely, 2^{1021011202221} is an apocalyptic number.

It is an amenable number.

1021011202221 is a deficient number, since it is larger than the sum of its proper divisors (363130623699).

1021011202221 is a wasteful number, since it uses less digits than its factorization.

1021011202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920916.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1021011202221 its reverse (1222021101201), we get a palindrome (2243032303422).

The spelling of 1021011202221 in words is "one trillion, twenty-one billion, eleven million, two hundred two thousand, two hundred twenty-one".