21221212122022 has 8 divisors (see below), whose sum is σ = 34725619836072. Its totient is φ = 9646005510000.

The previous prime is 21221212122017. The next prime is 21221212122067. The reversal of 21221212122022 is 22022121212212.

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

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 964600551001 = 21221212122022 / (2 + 1 + 2 + 2 + 1 + 2 + 1 + 2 + 1 + 2 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21221212121984 and 21221212122002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482300275479 + ... + 482300275522.

It is an arithmetic number, because the mean of its divisors is an integer number (4340702479509).

Almost surely, 2^{21221212122022} is an apocalyptic number.

21221212122022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221212122022 is a deficient number, since it is larger than the sum of its proper divisors (13504407714050).

21221212122022 is a wasteful number, since it uses less digits than its factorization.

21221212122022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964600551014.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21221212122022 its reverse (22022121212212), we get a palindrome (43243333334234).

The spelling of 21221212122022 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-two thousand, twenty-two".