20121321022011 has 12 divisors (see below), whose sum is σ = 31706324034840. Its totient is φ = 12194740013280.

The previous prime is 20121321021983. The next prime is 20121321022021. The reversal of 20121321022011 is 11022012312102.

20121321022011 is a `hidden beast` number, since 2 + 0 + 121 + 321 + 0 + 220 + 1 + 1 = 666.

It is not a de Polignac number, because 20121321022011 - 2¹³ = 20121321013819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121321022021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101622833346 + ... + 101622833543.

It is an arithmetic number, because the mean of its divisors is an integer number (2642193669570).

Almost surely, 2^{20121321022011} is an apocalyptic number.

20121321022011 is a deficient number, since it is larger than the sum of its proper divisors (11585003012829).

20121321022011 is a wasteful number, since it uses less digits than its factorization.

20121321022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203245666906 (or 203245666903 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 20121321022011 its reverse (11022012312102), we get a palindrome (31143333334113).

The spelling of 20121321022011 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty-one million, twenty-two thousand, eleven".