1011021214221 has 6 divisors (see below), whose sum is σ = 1460363976110. Its totient is φ = 674014142808.

The previous prime is 1011021214201. The next prime is 1011021214253. The reversal of 1011021214221 is 1224121201101.

1011021214221 is a `hidden beast` number, since 10 + 110 + 2 + 121 + 422 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 785020808196 + 226000406025 = 886014^2 + 475395^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1011021214221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011021214194 and 1011021214203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011021214201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56167845226 + ... + 56167845243.

Almost surely, 2^{1011021214221} is an apocalyptic number.

It is an amenable number.

1011021214221 is a deficient number, since it is larger than the sum of its proper divisors (449342761889).

1011021214221 is a wasteful number, since it uses less digits than its factorization.

1011021214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112335690475 (or 112335690472 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1011021214221 its reverse (1224121201101), we get a palindrome (2235142415322).

The spelling of 1011021214221 in words is "one trillion, eleven billion, twenty-one million, two hundred fourteen thousand, two hundred twenty-one".