20101322212001 has 4 divisors (see below), whose sum is σ = 21283752930372. Its totient is φ = 18918891493632.

The previous prime is 20101322211979. The next prime is 20101322212003. The reversal of 20101322212001 is 10021222310102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8803824831376 + 11297497380625 = 2967124^2 + 3361175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20101322212001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1182430718353 = 20101322212001 / (2 + 0 + 1 + 0 + 1 + 3 + 2 + 2 + 2 + 1 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20101322212003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591215359160 + ... + 591215359193.

It is an arithmetic number, because the mean of its divisors is an integer number (5320938232593).

Almost surely, 2^{20101322212001} is an apocalyptic number.

It is an amenable number.

20101322212001 is a deficient number, since it is larger than the sum of its proper divisors (1182430718371).

20101322212001 is a wasteful number, since it uses less digits than its factorization.

20101322212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182430718370.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20101322212001 its reverse (10021222310102), we get a palindrome (30122544522103).

The spelling of 20101322212001 in words is "twenty trillion, one hundred one billion, three hundred twenty-two million, two hundred twelve thousand, one".