221303021212122 has 64 divisors (see below), whose sum is σ = 455190278400000. Its totient is φ = 71687681892288.

The previous prime is 221303021212067. The next prime is 221303021212153. The reversal of 221303021212122 is 221212120303122.

It is a super-2 number, since 2×221303021212122² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221303021212092 and 221303021212101.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2182446379 + ... + 2182547777.

It is an arithmetic number, because the mean of its divisors is an integer number (7112348100000).

Almost surely, 2^{221303021212122} is an apocalyptic number.

221303021212122 is an abundant number, since it is smaller than the sum of its proper divisors (233887257187878).

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

221303021212122 is a wasteful number, since it uses less digits than its factorization.

221303021212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144155.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 221303021212122 its reverse (221212120303122), we get a palindrome (442515141515244).

The spelling of 221303021212122 in words is "two hundred twenty-one trillion, three hundred three billion, twenty-one million, two hundred twelve thousand, one hundred twenty-two".