1011211021223 has 12 divisors (see below), whose sum is σ = 1099561531680. Its totient is φ = 929519974656.

The previous prime is 1011211021189. The next prime is 1011211021229. The reversal of 1011211021223 is 3221201121101.

It is a happy number.

It is not a de Polignac number, because 1011211021223 - 2¹⁸ = 1011210759079 is a prime.

It is a super-3 number, since 3×1011211021223³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211021229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12477386 + ... + 12558167.

It is an arithmetic number, because the mean of its divisors is an integer number (91630127640).

Almost surely, 2^{1011211021223} is an apocalyptic number.

1011211021223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1011211021223 is a deficient number, since it is larger than the sum of its proper divisors (88350510457).

1011211021223 is a wasteful number, since it uses less digits than its factorization.

1011211021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25035818 (or 25035805 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1011211021223 its reverse (3221201121101), we get a palindrome (4232412142324).

The spelling of 1011211021223 in words is "one trillion, eleven billion, two hundred eleven million, twenty-one thousand, two hundred twenty-three".