1011021210221 has 8 divisors (see below), whose sum is σ = 1102977033888. Its totient is φ = 919072854000.

The previous prime is 1011021210197. The next prime is 1011021210233. The reversal of 1011021210221 is 1220121201101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011021210221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011021210196 and 1011021210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021210721) 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 7 ways as a sum of consecutive naturals, for example, 1581875 + ... + 2127056.

It is an arithmetic number, because the mean of its divisors is an integer number (137872129236).

Almost surely, 2^{1011021210221} is an apocalyptic number.

1011021210221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011021210221 is a deficient number, since it is larger than the sum of its proper divisors (91955823667).

1011021210221 is a wasteful number, since it uses less digits than its factorization.

1011021210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733723.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1011021210221 its reverse (1220121201101), we get a palindrome (2231142411322).

The spelling of 1011021210221 in words is "one trillion, eleven billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".