1321122023 has 4 divisors (see below), whose sum is σ = 1422746808. Its totient is φ = 1219497240.

The previous prime is 1321122017. The next prime is 1321122029. The reversal of 1321122023 is 3202211231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1321122017) and next prime (1321122029).

It is not a de Polignac number, because 1321122023 - 2⁶ = 1321121959 is a prime.

It is a super-2 number, since 2×1321122023² = 3490726799311225058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321121992 and 1321122010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321122029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50812373 + ... + 50812398.

It is an arithmetic number, because the mean of its divisors is an integer number (355686702).

Almost surely, 2^1321122023 is an apocalyptic number.

1321122023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1321122023 is a deficient number, since it is larger than the sum of its proper divisors (101624785).

1321122023 is a wasteful number, since it uses less digits than its factorization.

1321122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101624784.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1321122023 is about 36347.2423025461. The cubic root of 1321122023 is about 1097.2720345387.

Adding to 1321122023 its reverse (3202211231), we get a palindrome (4523333254).

The spelling of 1321122023 in words is "one billion, three hundred twenty-one million, one hundred twenty-two thousand, twenty-three".