1321121012211 has 192 divisors, whose sum is σ = 2634232473600. Its totient is φ = 615724830720.

The previous prime is 1321121012201. The next prime is 1321121012219. The reversal of 1321121012211 is 1122101211231.

It is a happy number.

1321121012211 is a `hidden beast` number, since 1 + 321 + 1 + 210 + 122 + 11 = 666.

It is not a de Polignac number, because 1321121012211 - 2⁶ = 1321121012147 is a prime.

It is a super-2 number, since 2×1321121012211² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321121012219) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 466331451 + ... + 466334283.

It is an arithmetic number, because the mean of its divisors is an integer number (13719960800).

Almost surely, 2^{1321121012211} is an apocalyptic number.

1321121012211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321121012211 is a deficient number, since it is larger than the sum of its proper divisors (1313111461389).

1321121012211 is a wasteful number, since it uses less digits than its factorization.

1321121012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1321121012211 its reverse (1122101211231), we get a palindrome (2443222223442).

The spelling of 1321121012211 in words is "one trillion, three hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred eleven".