21022120210101 has 32 divisors (see below), whose sum is σ = 29795321687040. Its totient is φ = 13146398164224.

The previous prime is 21022120210081. The next prime is 21022120210141. The reversal of 21022120210101 is 10101202122012.

It is not a de Polignac number, because 21022120210101 - 2¹⁷ = 21022120079029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022120210141) 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, 42654381 + ... + 43144413.

It is an arithmetic number, because the mean of its divisors is an integer number (931103802720).

Almost surely, 2^{21022120210101} is an apocalyptic number.

It is an amenable number.

21022120210101 is a deficient number, since it is larger than the sum of its proper divisors (8773201476939).

21022120210101 is a wasteful number, since it uses less digits than its factorization.

21022120210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497465.

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

Adding to 21022120210101 its reverse (10101202122012), we get a palindrome (31123322332113).

The spelling of 21022120210101 in words is "twenty-one trillion, twenty-two billion, one hundred twenty million, two hundred ten thousand, one hundred one".