2221001012 has 6 divisors (see below), whose sum is σ = 3886751778. Its totient is φ = 1110500504.

The previous prime is 2221001011. The next prime is 2221001053. The reversal of 2221001012 is 2101001222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1821240976 + 399760036 = 42676^2 + 19994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2221000984 and 2221001002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221001011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277625123 + ... + 277625130.

It is an arithmetic number, because the mean of its divisors is an integer number (647791963).

Almost surely, 2^2221001012 is an apocalyptic number.

It is an amenable number.

2221001012 is a deficient number, since it is larger than the sum of its proper divisors (1665750766).

2221001012 is a wasteful number, since it uses less digits than its factorization.

2221001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555250257 (or 555250255 counting only the distinct ones).

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

The square root of 2221001012 is about 47127.4974086255. The cubic root of 2221001012 is about 1304.7167927687.

Adding to 2221001012 its reverse (2101001222), we get a palindrome (4322002234).

The spelling of 2221001012 in words is "two billion, two hundred twenty-one million, one thousand, twelve".