1201101256 has 8 divisors (see below), whose sum is σ = 2252064870. Its totient is φ = 600550624.

The previous prime is 1201101247. The next prime is 1201101259. The reversal of 1201101256 is 6521011021.

It can be written as a sum of positive squares in only one way, i.e., 1067328900 + 133772356 = 32670^2 + 11566^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1201101259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75068821 + ... + 75068836.

Almost surely, 2^1201101256 is an apocalyptic number.

It is an amenable number.

1201101256 is a deficient number, since it is larger than the sum of its proper divisors (1050963614).

1201101256 is a wasteful number, since it uses less digits than its factorization.

1201101256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150137663 (or 150137659 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1201101256 is about 34656.9077674278. The cubic root of 1201101256 is about 1062.9835417716.

Adding to 1201101256 its reverse (6521011021), we get a palindrome (7722112277).

The spelling of 1201101256 in words is "one billion, two hundred one million, one hundred one thousand, two hundred fifty-six".