101211022221 has 64 divisors (see below), whose sum is σ = 150075072000. Its totient is φ = 60441486336.

The previous prime is 101211022217. The next prime is 101211022223. The reversal of 101211022221 is 122220112101.

It is not a de Polignac number, because 101211022221 - 2² = 101211022217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101211022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211022223) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25836955 + ... + 25840871.

It is an arithmetic number, because the mean of its divisors is an integer number (2344923000).

Almost surely, 2^101211022221 is an apocalyptic number.

It is an amenable number.

101211022221 is a deficient number, since it is larger than the sum of its proper divisors (48864049779).

101211022221 is a wasteful number, since it uses less digits than its factorization.

101211022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358.

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

Adding to 101211022221 its reverse (122220112101), we get a palindrome (223431134322).

The spelling of 101211022221 in words is "one hundred one billion, two hundred eleven million, twenty-two thousand, two hundred twenty-one".