1021211323223 has 16 divisors (see below), whose sum is σ = 1269078160896. Its totient is φ = 800146792800.

The previous prime is 1021211323193. The next prime is 1021211323261. The reversal of 1021211323223 is 3223231121201.

It is a cyclic number.

It is not a de Polignac number, because 1021211323223 - 2³⁰ = 1020137581399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021211323273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54466853 + ... + 54485598.

It is an arithmetic number, because the mean of its divisors is an integer number (79317385056).

Almost surely, 2^{1021211323223} is an apocalyptic number.

1021211323223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1021211323223 is a deficient number, since it is larger than the sum of its proper divisors (247866837673).

1021211323223 is a wasteful number, since it uses less digits than its factorization.

1021211323223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108952574.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1021211323223 its reverse (3223231121201), we get a palindrome (4244442444424).

The spelling of 1021211323223 in words is "one trillion, twenty-one billion, two hundred eleven million, three hundred twenty-three thousand, two hundred twenty-three".