22000021999971 has 16 divisors (see below), whose sum is σ = 29777145162624. Its totient is φ = 14444877896064.

The previous prime is 22000021999951. The next prime is 22000021999979. The reversal of 22000021999971 is 17999912000022.

It is not a de Polignac number, because 22000021999971 - 2¹⁰ = 22000021998947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22000021999979) 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, 9971430 + ... + 11976203.

It is an arithmetic number, because the mean of its divisors is an integer number (1861071572664).

Almost surely, 2^{22000021999971} is an apocalyptic number.

22000021999971 is a deficient number, since it is larger than the sum of its proper divisors (7777123162653).

22000021999971 is a wasteful number, since it uses less digits than its factorization.

22000021999971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21952690.

The product of its (nonzero) digits is 367416, while the sum is 51.

Adding to 22000021999971 its sum of digits (51), we get a palindrome (22000022000022).

Adding to 22000021999971 its reverse (17999912000022), we get a palindrome (39999933999993).

The spelling of 22000021999971 in words is "twenty-two trillion, twenty-one million, nine hundred ninety-nine thousand, nine hundred seventy-one".