21101212022001 has 8 divisors (see below), whose sum is σ = 28137164240640. Its totient is φ = 14066367242352.

The previous prime is 21101212021957. The next prime is 21101212022029. The reversal of 21101212022001 is 10022021210112.

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

It is not a de Polignac number, because 21101212022001 - 2⁶ = 21101212021937 is a prime.

It is a super-2 number, since 2×21101212022001² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21101212020001) 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, 276815286 + ... + 276891503.

It is an arithmetic number, because the mean of its divisors is an integer number (3517145530080).

Almost surely, 2^{21101212022001} is an apocalyptic number.

It is an amenable number.

21101212022001 is a deficient number, since it is larger than the sum of its proper divisors (7035952218639).

21101212022001 is a wasteful number, since it uses less digits than its factorization.

21101212022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553719495.

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

Adding to 21101212022001 its reverse (10022021210112), we get a palindrome (31123233232113).

The spelling of 21101212022001 in words is "twenty-one trillion, one hundred one billion, two hundred twelve million, twenty-two thousand, one".