101011222221 has 32 divisors (see below), whose sum is σ = 170242076928. Its totient is φ = 51840622080.

The previous prime is 101011222219. The next prime is 101011222253. The reversal of 101011222221 is 122222110101.

It is not a de Polignac number, because 101011222221 - 2¹ = 101011222219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101011222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101011222271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4989960 + ... + 5010161.

It is an arithmetic number, because the mean of its divisors is an integer number (5320064904).

Almost surely, 2^101011222221 is an apocalyptic number.

It is an amenable number.

101011222221 is a deficient number, since it is larger than the sum of its proper divisors (69230854707).

101011222221 is a wasteful number, since it uses less digits than its factorization.

101011222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10000181.

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

Adding to 101011222221 its reverse (122222110101), we get a palindrome (223233332322).

It can be divided in two parts, 10101 and 1222221, that multiplied together give a palindrome (12345654321).

The spelling of 101011222221 in words is "one hundred one billion, eleven million, two hundred twenty-two thousand, two hundred twenty-one".