1211146123 has 16 divisors (see below), whose sum is σ = 1362746880. Its totient is φ = 1066716000.

The previous prime is 1211146117. The next prime is 1211146129. The reversal of 1211146123 is 3216411121.

It is an interprime number because it is at equal distance from previous prime (1211146117) and next prime (1211146129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211146123 is a prime.

It is a super-2 number, since 2×1211146123² = 2933749862515862258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211146094 and 1211146103.

It is not an unprimeable number, because it can be changed into a prime (1211146129) 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, 91048 + ... + 103498.

It is an arithmetic number, because the mean of its divisors is an integer number (85171680).

Almost surely, 2^1211146123 is an apocalyptic number.

1211146123 is a deficient number, since it is larger than the sum of its proper divisors (151600757).

1211146123 is a wasteful number, since it uses less digits than its factorization.

1211146123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12738.

The product of its digits is 288, while the sum is 22.

The square root of 1211146123 is about 34801.5247223451. The cubic root of 1211146123 is about 1065.9385799685.

Adding to 1211146123 its reverse (3216411121), we get a palindrome (4427557244).

The spelling of 1211146123 in words is "one billion, two hundred eleven million, one hundred forty-six thousand, one hundred twenty-three".