210001222000 has 40 divisors (see below), whose sum is σ = 507782959632. Its totient is φ = 84000488000.

The previous prime is 210001221973. The next prime is 210001222009. The reversal of 210001222000 is 222100012.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001222009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52498306 + ... + 52502305.

Almost surely, 2^210001222000 is an apocalyptic number.

210001222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001222000 is an abundant number, since it is smaller than the sum of its proper divisors (297781737632).

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

210001222000 is a wasteful number, since it uses less digits than its factorization.

210001222000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105000634 (or 105000618 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 210001222000 its reverse (222100012), we get a palindrome (210223322012).

The spelling of 210001222000 in words is "two hundred ten billion, one million, two hundred twenty-two thousand".