21001211000222 has 32 divisors (see below), whose sum is σ = 33329033273088. Its totient is φ = 9908696160000.

The previous prime is 21001211000221. The next prime is 21001211000243. The reversal of 21001211000222 is 22200011210012.

It is a junction number, because it is equal to n+sod(n) for n = 21001211000197 and 21001211000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001211000221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2510972 + ... + 6950352.

It is an arithmetic number, because the mean of its divisors is an integer number (1041532289784).

Almost surely, 2^{21001211000222} is an apocalyptic number.

21001211000222 is a deficient number, since it is larger than the sum of its proper divisors (12327822272866).

21001211000222 is a wasteful number, since it uses less digits than its factorization.

21001211000222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441316.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21001211000222 its reverse (22200011210012), we get a palindrome (43201222210234).

The spelling of 21001211000222 in words is "twenty-one trillion, one billion, two hundred eleven million, two hundred twenty-two", and thus it is an aban number.