21022020122201 has 8 divisors (see below), whose sum is σ = 25438410904320. Its totient is φ = 16958940602688.

The previous prime is 21022020122137. The next prime is 21022020122203. The reversal of 21022020122201 is 10222102022012.

It is a happy number.

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

It is not a de Polignac number, because 21022020122201 - 2⁶ = 21022020122137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21022020122201.

It is not an unprimeable number, because it can be changed into a prime (21022020122203) 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, 88327815521 + ... + 88327815758.

It is an arithmetic number, because the mean of its divisors is an integer number (3179801363040).

Almost surely, 2^{21022020122201} is an apocalyptic number.

It is an amenable number.

21022020122201 is a deficient number, since it is larger than the sum of its proper divisors (4416390782119).

21022020122201 is a wasteful number, since it uses less digits than its factorization.

21022020122201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176655631303.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21022020122201 its reverse (10222102022012), we get a palindrome (31244122144213).

The spelling of 21022020122201 in words is "twenty-one trillion, twenty-two billion, twenty million, one hundred twenty-two thousand, two hundred one".