1211341121020 has 48 divisors (see below), whose sum is σ = 2696021042400. Its totient is φ = 455599437824.

The previous prime is 1211341121009. The next prime is 1211341121021. The reversal of 1211341121020 is 201211431121.

It is a super-2 number, since 2×1211341121020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211341121021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1341514 + ... + 2054833.

It is an arithmetic number, because the mean of its divisors is an integer number (56167105050).

Almost surely, 2^{1211341121020} is an apocalyptic number.

1211341121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211341121020 is an abundant number, since it is smaller than the sum of its proper divisors (1484679921380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211341121020 is a wasteful number, since it uses less digits than its factorization.

1211341121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397422 (or 3397420 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211341121020 its reverse (201211431121), we get a palindrome (1412552552141).

The spelling of 1211341121020 in words is "one trillion, two hundred eleven billion, three hundred forty-one million, one hundred twenty-one thousand, twenty".