1211145463641 has 4 divisors (see below), whose sum is σ = 1614860618192. Its totient is φ = 807430309092.

The previous prime is 1211145463603. The next prime is 1211145463673. The reversal of 1211145463641 is 1463645411121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1211145463641 - 2²² = 1211141269337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211145463641.

It is not an unprimeable number, because it can be changed into a prime (1211145463601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201857577271 + ... + 201857577276.

It is an arithmetic number, because the mean of its divisors is an integer number (403715154548).

Almost surely, 2^{1211145463641} is an apocalyptic number.

It is an amenable number.

1211145463641 is a deficient number, since it is larger than the sum of its proper divisors (403715154551).

1211145463641 is an equidigital number, since it uses as much as digits as its factorization.

1211145463641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403715154550.

The product of its digits is 69120, while the sum is 39.

The spelling of 1211145463641 in words is "one trillion, two hundred eleven billion, one hundred forty-five million, four hundred sixty-three thousand, six hundred forty-one".