1022011111221 has 8 divisors (see below), whose sum is σ = 1374740610240. Its totient is φ = 675311176512.

The previous prime is 1022011111207. The next prime is 1022011111249. The reversal of 1022011111221 is 1221111102201.

It is a happy number.

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

It is not a de Polignac number, because 1022011111221 - 2¹⁵ = 1022011078453 is a prime.

It is a super-2 number, since 2×1022011111221² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1022011111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022011111201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1507390681 + ... + 1507391358.

It is an arithmetic number, because the mean of its divisors is an integer number (171842576280).

Almost surely, 2^{1022011111221} is an apocalyptic number.

It is an amenable number.

1022011111221 is a deficient number, since it is larger than the sum of its proper divisors (352729499019).

1022011111221 is a wasteful number, since it uses less digits than its factorization.

1022011111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014782155.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1022011111221 its reverse (1221111102201), we get a palindrome (2243122213422).

The spelling of 1022011111221 in words is "one trillion, twenty-two billion, eleven million, one hundred eleven thousand, two hundred twenty-one".