1211200211445 has 32 divisors (see below), whose sum is σ = 2214811011072. Its totient is φ = 553680297792.

The previous prime is 1211200211443. The next prime is 1211200211447. The reversal of 1211200211445 is 5441120021121.

It is an interprime number because it is at equal distance from previous prime (1211200211443) and next prime (1211200211447).

It is not a de Polignac number, because 1211200211445 - 2¹ = 1211200211443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211200211443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7337994 + ... + 7501236.

It is an arithmetic number, because the mean of its divisors is an integer number (69212844096).

Almost surely, 2^{1211200211445} is an apocalyptic number.

1211200211445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211200211445 is a deficient number, since it is larger than the sum of its proper divisors (1003610799627).

1211200211445 is a wasteful number, since it uses less digits than its factorization.

1211200211445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233921.

The product of its (nonzero) digits is 640, while the sum is 24.

Adding to 1211200211445 its reverse (5441120021121), we get a palindrome (6652320232566).

The spelling of 1211200211445 in words is "one trillion, two hundred eleven billion, two hundred million, two hundred eleven thousand, four hundred forty-five".