22001001212 has 6 divisors (see below), whose sum is σ = 38501752128. Its totient is φ = 11000500604.

The previous prime is 22001001179. The next prime is 22001001221. The reversal of 22001001212 is 21210010022.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22001001193 and 22001001202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750125148 + ... + 2750125155.

It is an arithmetic number, because the mean of its divisors is an integer number (6416958688).

Almost surely, 2^22001001212 is an apocalyptic number.

It is an amenable number.

22001001212 is a deficient number, since it is larger than the sum of its proper divisors (16500750916).

22001001212 is a wasteful number, since it uses less digits than its factorization.

22001001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5500250307 (or 5500250305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 22001001212 its reverse (21210010022), we get a palindrome (43211011234).

The spelling of 22001001212 in words is "twenty-two billion, one million, one thousand, two hundred twelve".