22221200101221 has 48 divisors (see below), whose sum is σ = 36384117719040. Its totient is φ = 12946650660000.

The previous prime is 22221200101183. The next prime is 22221200101277. The reversal of 22221200101221 is 12210100212222.

It is a happy number.

22221200101221 is a `hidden beast` number, since 2 + 222 + 120 + 0 + 101 + 221 = 666.

It is not a de Polignac number, because 22221200101221 - 2⁶ = 22221200101157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22221200101194 and 22221200101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221200101921) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23511861 + ... + 24438698.

It is an arithmetic number, because the mean of its divisors is an integer number (758002452480).

Almost surely, 2^{22221200101221} is an apocalyptic number.

It is an amenable number.

22221200101221 is a deficient number, since it is larger than the sum of its proper divisors (14162917617819).

22221200101221 is a wasteful number, since it uses less digits than its factorization.

22221200101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47950758 (or 47950755 counting only the distinct ones).

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

Adding to 22221200101221 its reverse (12210100212222), we get a palindrome (34431300313443).

The spelling of 22221200101221 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred million, one hundred one thousand, two hundred twenty-one".