21021221020022 has 8 divisors (see below), whose sum is σ = 31547652826296. Its totient is φ = 10505336744592.

The previous prime is 21021221019979. The next prime is 21021221020027. The reversal of 21021221020022 is 22002012212012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21021221020022² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021221020027) 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, 2636877728 + ... + 2636885699.

It is an arithmetic number, because the mean of its divisors is an integer number (3943456603287).

Almost surely, 2^{21021221020022} is an apocalyptic number.

21021221020022 is a deficient number, since it is larger than the sum of its proper divisors (10526431806274).

21021221020022 is a wasteful number, since it uses less digits than its factorization.

21021221020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273765422.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21021221020022 its reverse (22002012212012), we get a palindrome (43023233232034).

The spelling of 21021221020022 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-one million, twenty thousand, twenty-two".