1011223144 has 8 divisors (see below), whose sum is σ = 1896043410. Its totient is φ = 505611568.

The previous prime is 1011223141. The next prime is 1011223153. The reversal of 1011223144 is 4413221101.

It can be written as a sum of positive squares in only one way, i.e., 940158244 + 71064900 = 30662^2 + 8430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1011223144² = 2045144493922489472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011223141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63201439 + ... + 63201454.

Almost surely, 2^1011223144 is an apocalyptic number.

It is an amenable number.

1011223144 is a deficient number, since it is larger than the sum of its proper divisors (884820266).

1011223144 is a wasteful number, since it uses less digits than its factorization.

1011223144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126402899 (or 126402895 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1011223144 is about 31799.7349674490. The cubic root of 1011223144 is about 1003.7271391750.

Adding to 1011223144 its reverse (4413221101), we get a palindrome (5424444245).

The spelling of 1011223144 in words is "one billion, eleven million, two hundred twenty-three thousand, one hundred forty-four".