21020101222001 has 16 divisors (see below), whose sum is σ = 24029875615104. Its totient is φ = 18012053234304.

The previous prime is 21020101221967. The next prime is 21020101222079. The reversal of 21020101222001 is 10022210102012.

It is a cyclic number.

It is not a de Polignac number, because 21020101222001 - 2³⁴ = 21002921352817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020100222001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543037490 + ... + 543076196.

It is an arithmetic number, because the mean of its divisors is an integer number (1501867225944).

Almost surely, 2^{21020101222001} is an apocalyptic number.

It is an amenable number.

21020101222001 is a deficient number, since it is larger than the sum of its proper divisors (3009774393103).

21020101222001 is a wasteful number, since it uses less digits than its factorization.

21020101222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59000.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21020101222001 its reverse (10022210102012), we get a palindrome (31042311324013).

The spelling of 21020101222001 in words is "twenty-one trillion, twenty billion, one hundred one million, two hundred twenty-two thousand, one".