102012211221 has 8 divisors (see below), whose sum is σ = 140403903744. Its totient is φ = 65814329760.

The previous prime is 102012211201. The next prime is 102012211229. The reversal of 102012211221 is 122112210201.

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

It is not a de Polignac number, because 102012211221 - 2¹⁰ = 102012210197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102012211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012211229) 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, 548452656 + ... + 548452841.

It is an arithmetic number, because the mean of its divisors is an integer number (17550487968).

Almost surely, 2^102012211221 is an apocalyptic number.

It is an amenable number.

102012211221 is a deficient number, since it is larger than the sum of its proper divisors (38391692523).

102012211221 is a wasteful number, since it uses less digits than its factorization.

102012211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096905531.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102012211221 its reverse (122112210201), we get a palindrome (224124421422).

The spelling of 102012211221 in words is "one hundred two billion, twelve million, two hundred eleven thousand, two hundred twenty-one".