21221422101 has 24 divisors (see below), whose sum is σ = 34255428480. Its totient is φ = 12547771200.

The previous prime is 21221422091. The next prime is 21221422111. The reversal of 21221422101 is 10122412212.

21221422101 is a `hidden beast` number, since 21 + 221 + 422 + 1 + 0 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21221422091) and next prime (21221422111).

It is not a de Polignac number, because 21221422101 - 2⁶ = 21221422037 is a prime.

It is a super-2 number, since 2×21221422101² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221422111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2610061 + ... + 2618178.

It is an arithmetic number, because the mean of its divisors is an integer number (1427309520).

Almost surely, 2^21221422101 is an apocalyptic number.

It is an amenable number.

21221422101 is a deficient number, since it is larger than the sum of its proper divisors (13034006379).

21221422101 is a wasteful number, since it uses less digits than its factorization.

21221422101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228297 (or 5228294 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21221422101 its reverse (10122412212), we get a palindrome (31343834313).

The spelling of 21221422101 in words is "twenty-one billion, two hundred twenty-one million, four hundred twenty-two thousand, one hundred one".