11122002121221 has 12 divisors (see below), whose sum is σ = 16078101348972. Its totient is φ = 7408674000576.

The previous prime is 11122002121213. The next prime is 11122002121267. The reversal of 11122002121221 is 12212120022111.

11122002121221 is a `hidden beast` number, since 1 + 11 + 220 + 0 + 212 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4811380832196 + 6310621289025 = 2193486^2 + 2512095^2 .

It is not a de Polignac number, because 11122002121221 - 2³ = 11122002121213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11122002121194 and 11122002121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122002121621) 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, 499494936 + ... + 499517201.

It is an arithmetic number, because the mean of its divisors is an integer number (1339841779081).

Almost surely, 2^{11122002121221} is an apocalyptic number.

It is an amenable number.

11122002121221 is a deficient number, since it is larger than the sum of its proper divisors (4956099227751).

11122002121221 is a wasteful number, since it uses less digits than its factorization.

11122002121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999013380 (or 999013377 counting only the distinct ones).

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

Adding to 11122002121221 its reverse (12212120022111), we get a palindrome (23334122143332).

The spelling of 11122002121221 in words is "eleven trillion, one hundred twenty-two billion, two million, one hundred twenty-one thousand, two hundred twenty-one".