212222021000 has 96 divisors (see below), whose sum is σ = 545849380440. Its totient is φ = 77171600000.

The previous prime is 212222020987. The next prime is 212222021051. The reversal of 212222021000 is 120222212.

It can be written as a sum of positive squares in 4 ways, for example, as 12436264324 + 199785756676 = 111518^2 + 446974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 755951 + ... + 997950.

Almost surely, 2^212222021000 is an apocalyptic number.

212222021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212222021000 is an abundant number, since it is smaller than the sum of its proper divisors (333627359440).

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

212222021000 is a wasteful number, since it uses less digits than its factorization.

212222021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753944 (or 1753919 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 212222021000 its reverse (120222212), we get a palindrome (212342243212).

The spelling of 212222021000 in words is "two hundred twelve billion, two hundred twenty-two million, twenty-one thousand".