20022211002001 has 4 divisors (see below), whose sum is σ = 21562381079092. Its totient is φ = 18482040924912.

The previous prime is 20022211001999. The next prime is 20022211002011. The reversal of 20022211002001 is 10020011222002.

It is a happy number.

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 1705531521600 + 18316679480401 = 1305960^2 + 4279799^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022211002001 - 2¹ = 20022211001999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 1540170077077 = 20022211002001 / (2 + 0 + 0 + 2 + 2 + 2 + 1 + 1 + 0 + 0 + 2 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022211002011) 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, 770085038526 + ... + 770085038551.

It is an arithmetic number, because the mean of its divisors is an integer number (5390595269773).

Almost surely, 2^{20022211002001} is an apocalyptic number.

It is an amenable number.

20022211002001 is a deficient number, since it is larger than the sum of its proper divisors (1540170077091).

20022211002001 is a wasteful number, since it uses less digits than its factorization.

20022211002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540170077090.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20022211002001 its reverse (10020011222002), we get a palindrome (30042222224003).

The spelling of 20022211002001 in words is "twenty trillion, twenty-two billion, two hundred eleven million, two thousand, one".