1211213399941 has 4 divisors (see below), whose sum is σ = 1239381153472. Its totient is φ = 1183045646412.

The previous prime is 1211213399897. The next prime is 1211213399951. The reversal of 1211213399941 is 1499933121121.

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 a cyclic number.

It is not a de Polignac number, because 1211213399941 - 2¹¹ = 1211213397893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211213399891 and 1211213399900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211213399951) 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, 14083876701 + ... + 14083876786.

It is an arithmetic number, because the mean of its divisors is an integer number (309845288368).

Almost surely, 2^{1211213399941} is an apocalyptic number.

It is an amenable number.

1211213399941 is a deficient number, since it is larger than the sum of its proper divisors (28167753531).

1211213399941 is an equidigital number, since it uses as much as digits as its factorization.

1211213399941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28167753530.

The product of its digits is 104976, while the sum is 46.

The spelling of 1211213399941 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, three hundred ninety-nine thousand, nine hundred forty-one".