21022101122001 has 64 divisors (see below), whose sum is σ = 32237306787840. Its totient is φ = 11936519562240.

The previous prime is 21022101121991. The next prime is 21022101122003. The reversal of 21022101122001 is 10022110122012.

It is not a de Polignac number, because 21022101122001 - 2¹¹ = 21022101119953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21022101122003) 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, 7152805990 + ... + 7152808928.

It is an arithmetic number, because the mean of its divisors is an integer number (503707918560).

Almost surely, 2^{21022101122001} is an apocalyptic number.

21022101122001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21022101122001 is a deficient number, since it is larger than the sum of its proper divisors (11215205665839).

21022101122001 is a wasteful number, since it uses less digits than its factorization.

21022101122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5814.

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

Adding to 21022101122001 its reverse (10022110122012), we get a palindrome (31044211244013).

The spelling of 21022101122001 in words is "twenty-one trillion, twenty-two billion, one hundred one million, one hundred twenty-two thousand, one".