1211125201 has 8 divisors (see below), whose sum is σ = 1422860544. Its totient is φ = 1016328720.

The previous prime is 1211125183. The next prime is 1211125211. The reversal of 1211125201 is 1025211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1211125201 - 2¹⁹ = 1210600913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211125211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4234561 + ... + 4234846.

It is an arithmetic number, because the mean of its divisors is an integer number (177857568).

Almost surely, 2^1211125201 is an apocalyptic number.

1211125201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211125201 is a deficient number, since it is larger than the sum of its proper divisors (211735343).

1211125201 is a wasteful number, since it uses less digits than its factorization.

1211125201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8469431.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 1211125201 is about 34801.2241307687. The cubic root of 1211125201 is about 1065.9324420646.

Adding to 1211125201 its reverse (1025211121), we get a palindrome (2236336322).

The spelling of 1211125201 in words is "one billion, two hundred eleven million, one hundred twenty-five thousand, two hundred one".