1211231422401 has 128 divisors (see below), whose sum is σ = 2198956032000. Its totient is φ = 572672194560.

The previous prime is 1211231422343. The next prime is 1211231422403. The reversal of 1211231422401 is 1042241321121.

It is not a de Polignac number, because 1211231422401 - 2⁶ = 1211231422337 is a prime.

It is a super-2 number, since 2×1211231422401² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211231422403) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 61290360 + ... + 61310118.

It is an arithmetic number, because the mean of its divisors is an integer number (17179344000).

Almost surely, 2^{1211231422401} is an apocalyptic number.

1211231422401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211231422401 is a deficient number, since it is larger than the sum of its proper divisors (987724609599).

1211231422401 is a wasteful number, since it uses less digits than its factorization.

1211231422401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20079.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1211231422401 its reverse (1042241321121), we get a palindrome (2253472743522).

The spelling of 1211231422401 in words is "one trillion, two hundred eleven billion, two hundred thirty-one million, four hundred twenty-two thousand, four hundred one".