221001210021122 has 8 divisors (see below), whose sum is σ = 331509703738176. Its totient is φ = 110497975441732.

The previous prime is 221001210021103. The next prime is 221001210021127. The reversal of 221001210021122 is 221120012100122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×221001210021122² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221001210021122.

It is not an unprimeable number, because it can be changed into a prime (221001210021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1314679358 + ... + 1314847449.

It is an arithmetic number, because the mean of its divisors is an integer number (41438712967272).

Almost surely, 2^{221001210021122} is an apocalyptic number.

221001210021122 is a deficient number, since it is larger than the sum of its proper divisors (110508493717054).

221001210021122 is a wasteful number, since it uses less digits than its factorization.

221001210021122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629568832.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221001210021122 its reverse (221120012100122), we get a palindrome (442121222121244).

The spelling of 221001210021122 in words is "two hundred twenty-one trillion, one billion, two hundred ten million, twenty-one thousand, one hundred twenty-two".