1211701552 has 20 divisors (see below), whose sum is σ = 2369213440. Its totient is φ = 600291648.

The previous prime is 1211701531. The next prime is 1211701597. The reversal of 1211701552 is 2551071121.

It is a super-2 number, since 2×1211701552² = 2936441302238417408, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345648 + ... + 349135.

It is an arithmetic number, because the mean of its divisors is an integer number (118460672).

Almost surely, 2^1211701552 is an apocalyptic number.

It is an amenable number.

1211701552 is a deficient number, since it is larger than the sum of its proper divisors (1157511888).

1211701552 is a wasteful number, since it uses less digits than its factorization.

1211701552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694900 (or 694894 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 25.

The square root of 1211701552 is about 34809.5037597493. The cubic root of 1211701552 is about 1066.1015007773.

Adding to 1211701552 its reverse (2551071121), we get a palindrome (3762772673).

The spelling of 1211701552 in words is "one billion, two hundred eleven million, seven hundred one thousand, five hundred fifty-two".