21020222212222 has 8 divisors (see below), whose sum is σ = 31530354840000. Its totient is φ = 10510103932224.

The previous prime is 21020222212211. The next prime is 21020222212307. The reversal of 21020222212222 is 22221222202012.

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

It is a super-3 number, since 3×21020222212222³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020222212193 and 21020222212202.

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, 1543054 + ... + 6664942.

It is an arithmetic number, because the mean of its divisors is an integer number (3941294355000).

Almost surely, 2^{21020222212222} is an apocalyptic number.

21020222212222 is a deficient number, since it is larger than the sum of its proper divisors (10510132627778).

21020222212222 is a wasteful number, since it uses less digits than its factorization.

21020222212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7173890.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 21020222212222 its reverse (22221222202012), we get a palindrome (43241444414234).

The spelling of 21020222212222 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two hundred twelve thousand, two hundred twenty-two".