21122211010220 has 24 divisors (see below), whose sum is σ = 45388192963344. Its totient is φ = 8252398719936.

The previous prime is 21122211010207. The next prime is 21122211010231. The reversal of 21122211010220 is 2201011222112.

It is a super-2 number, since 2×21122211010220² (a number of 27 digits) contains 22 as substring.

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, 12280354379 + ... + 12280356098.

It is an arithmetic number, because the mean of its divisors is an integer number (1891174706806).

Almost surely, 2^{21122211010220} is an apocalyptic number.

21122211010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122211010220 is an abundant number, since it is smaller than the sum of its proper divisors (24265981953124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122211010220 is a wasteful number, since it uses less digits than its factorization.

21122211010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24560710529 (or 24560710527 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21122211010220 its reverse (2201011222112), we get a palindrome (23323222232332).

The spelling of 21122211010220 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred eleven million, ten thousand, two hundred twenty".