1211353125 has 48 divisors (see below), whose sum is σ = 2034119808. Its totient is φ = 641160000.

The previous prime is 1211353111. The next prime is 1211353141. The reversal of 1211353125 is 5213531121.

It is not a de Polignac number, because 1211353125 - 2⁴ = 1211353109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211353095 and 1211353104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1471464 + ... + 1472286.

It is an arithmetic number, because the mean of its divisors is an integer number (42377496).

Almost surely, 2^1211353125 is an apocalyptic number.

1211353125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211353125 is a deficient number, since it is larger than the sum of its proper divisors (822766683).

1211353125 is an frugal number, since it uses more digits than its factorization.

1211353125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 988 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 1211353125 is about 34804.4986316424. The cubic root of 1211353125 is about 1065.9993045015. Note that the first 3 decimals are identical.

Adding to 1211353125 its reverse (5213531121), we get a palindrome (6424884246).

The spelling of 1211353125 in words is "one billion, two hundred eleven million, three hundred fifty-three thousand, one hundred twenty-five".