22121201021121 has 32 divisors (see below), whose sum is σ = 33188083200000. Its totient is φ = 14560309589904.

The previous prime is 22121201021099. The next prime is 22121201021137. The reversal of 22121201021121 is 12112010212122.

22121201021121 is a `hidden beast` number, since 221 + 212 + 0 + 1 + 0 + 211 + 21 = 666.

It is not a de Polignac number, because 22121201021121 - 2¹³ = 22121201012929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22121201021094 and 22121201021103.

It is not an unprimeable number, because it can be changed into a prime (22121201022121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71435380 + ... + 71744378.

It is an arithmetic number, because the mean of its divisors is an integer number (1037127600000).

Almost surely, 2^{22121201021121} is an apocalyptic number.

It is an amenable number.

22121201021121 is a deficient number, since it is larger than the sum of its proper divisors (11066882178879).

22121201021121 is a wasteful number, since it uses less digits than its factorization.

22121201021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342650 (or 342644 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22121201021121 its reverse (12112010212122), we get a palindrome (34233211233243).

The spelling of 22121201021121 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, twenty-one thousand, one hundred twenty-one".