1201223134 has 4 divisors (see below), whose sum is σ = 1801834704. Its totient is φ = 600611566.

The previous prime is 1201223131. The next prime is 1201223137. The reversal of 1201223134 is 4313221021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4313221021 = 281 ⋅15349541.

It is an interprime number because it is at equal distance from previous prime (1201223131) and next prime (1201223137).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201223131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300305782 + ... + 300305785.

It is an arithmetic number, because the mean of its divisors is an integer number (450458676).

Almost surely, 2^1201223134 is an apocalyptic number.

1201223134 is a deficient number, since it is larger than the sum of its proper divisors (600611570).

1201223134 is an equidigital number, since it uses as much as digits as its factorization.

1201223134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600611569.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1201223134 is about 34658.6660735811. Note that the first 3 decimals coincide. The cubic root of 1201223134 is about 1063.0194948676.

Adding to 1201223134 its reverse (4313221021), we get a palindrome (5514444155).

It can be divided in two parts, 120122 and 3134, that added together give a triangular number (123256 = T₄₉₆).

The spelling of 1201223134 in words is "one billion, two hundred one million, two hundred twenty-three thousand, one hundred thirty-four".