1211031052401 has 4 divisors (see below), whose sum is σ = 1614708069872. Its totient is φ = 807354034932.

The previous prime is 1211031052351. The next prime is 1211031052409. The reversal of 1211031052401 is 1042501301121.

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 1211031052401 - 2¹⁸ = 1211030790257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211031052409) 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, 201838508731 + ... + 201838508736.

It is an arithmetic number, because the mean of its divisors is an integer number (403677017468).

Almost surely, 2^{1211031052401} is an apocalyptic number.

It is an amenable number.

1211031052401 is a deficient number, since it is larger than the sum of its proper divisors (403677017471).

1211031052401 is an equidigital number, since it uses as much as digits as its factorization.

1211031052401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403677017470.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 1211031052401 its reverse (1042501301121), we get a palindrome (2253532353522).

The spelling of 1211031052401 in words is "one trillion, two hundred eleven billion, thirty-one million, fifty-two thousand, four hundred one".