221201001202122 has 24 divisors (see below), whose sum is σ = 481778096866560. Its totient is φ = 73347626924520.

The previous prime is 221201001202099. The next prime is 221201001202123. The reversal of 221201001202122 is 221202100102122.

It is a happy number.

221201001202122 is a `hidden beast` number, since 221 + 20 + 100 + 1 + 202 + 122 = 666.

221201001202122 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221201001202095 and 221201001202104.

It is not an unprimeable number, because it can be changed into a prime (221201001202123) 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, 32170008372 + ... + 32170015247.

It is an arithmetic number, because the mean of its divisors is an integer number (20074087369440).

Almost surely, 2^{221201001202122} is an apocalyptic number.

221201001202122 is an abundant number, since it is smaller than the sum of its proper divisors (260577095664438).

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

221201001202122 is a wasteful number, since it uses less digits than its factorization.

221201001202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64340023818 (or 64340023815 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221201001202122 its reverse (221202100102122), we get a palindrome (442403101304244).

The spelling of 221201001202122 in words is "two hundred twenty-one trillion, two hundred one billion, one million, two hundred two thousand, one hundred twenty-two".