1001201212222 has 4 divisors (see below), whose sum is σ = 1501801818336. Its totient is φ = 500600606110.

The previous prime is 1001201212211. The next prime is 1001201212223. The reversal of 1001201212222 is 2222121021001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1001201212196 and 1001201212205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001201212223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250300303054 + ... + 250300303057.

It is an arithmetic number, because the mean of its divisors is an integer number (375450454584).

Almost surely, 2^{1001201212222} is an apocalyptic number.

1001201212222 is a deficient number, since it is larger than the sum of its proper divisors (500600606114).

1001201212222 is an equidigital number, since it uses as much as digits as its factorization.

1001201212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500600606113.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1001201212222 its reverse (2222121021001), we get a palindrome (3223322233223).

The spelling of 1001201212222 in words is "one trillion, one billion, two hundred one million, two hundred twelve thousand, two hundred twenty-two".