1200121223 has 4 divisors (see below), whose sum is σ = 1371567120. Its totient is φ = 1028675328.

The previous prime is 1200121217. The next prime is 1200121229. The reversal of 1200121223 is 3221210021.

It is a happy number.

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 (1200121217) and next prime (1200121229).

It is a cyclic number.

It is not a de Polignac number, because 1200121223 - 2⁴ = 1200121207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200121198 and 1200121207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200121229) 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, 85722938 + ... + 85722951.

It is an arithmetic number, because the mean of its divisors is an integer number (342891780).

Almost surely, 2^1200121223 is an apocalyptic number.

1200121223 is a deficient number, since it is larger than the sum of its proper divisors (171445897).

1200121223 is an equidigital number, since it uses as much as digits as its factorization.

1200121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171445896.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1200121223 is about 34642.7658104834. The cubic root of 1200121223 is about 1062.6943509388.

Adding to 1200121223 its reverse (3221210021), we get a palindrome (4421331244).

The spelling of 1200121223 in words is "one billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-three".