21020244144022 has 16 divisors (see below), whose sum is σ = 31772167916544. Its totient is φ = 10429527121000.

The previous prime is 21020244144013. The next prime is 21020244144037. The reversal of 21020244144022 is 22044144202012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6174747 + ... + 8953657.

It is an arithmetic number, because the mean of its divisors is an integer number (1985760494784).

Almost surely, 2^{21020244144022} is an apocalyptic number.

21020244144022 is a deficient number, since it is larger than the sum of its proper divisors (10751923772522).

21020244144022 is a wasteful number, since it uses less digits than its factorization.

21020244144022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807915.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 21020244144022 its reverse (22044144202012), we get a palindrome (43064388346034).

The spelling of 21020244144022 in words is "twenty-one trillion, twenty billion, two hundred forty-four million, one hundred forty-four thousand, twenty-two".