221202112012021 has 8 divisors (see below), whose sum is σ = 253936056840704. Its totient is φ = 188751577961520.

The previous prime is 221202112012009. The next prime is 221202112012051. The reversal of 221202112012021 is 120210211202122.

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

It is not a de Polignac number, because 221202112012021 - 2⁹ = 221202112011509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221202112012021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221202112012001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70852692870 + ... + 70852695991.

It is an arithmetic number, because the mean of its divisors is an integer number (31742007105088).

Almost surely, 2^{221202112012021} is an apocalyptic number.

It is an amenable number.

221202112012021 is a deficient number, since it is larger than the sum of its proper divisors (32733944828683).

221202112012021 is a wasteful number, since it uses less digits than its factorization.

221202112012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141705389091.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221202112012021 its reverse (120210211202122), we get a palindrome (341412323214143).

The spelling of 221202112012021 in words is "two hundred twenty-one trillion, two hundred two billion, one hundred twelve million, twelve thousand, twenty-one".