1221055701 has 16 divisors (see below), whose sum is σ = 1686519360. Its totient is φ = 784891520.

The previous prime is 1221055697. The next prime is 1221055741. The reversal of 1221055701 is 1075501221.

It is a cyclic number.

It is not a de Polignac number, because 1221055701 - 2² = 1221055697 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221055741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56986 + ... + 75428.

It is an arithmetic number, because the mean of its divisors is an integer number (105407460).

Almost surely, 2^1221055701 is an apocalyptic number.

It is an amenable number.

1221055701 is a deficient number, since it is larger than the sum of its proper divisors (465463659).

1221055701 is a wasteful number, since it uses less digits than its factorization.

1221055701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19236.

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 1221055701 is about 34943.6074411329. The cubic root of 1221055701 is about 1068.8378511007.

Adding to 1221055701 its reverse (1075501221), we get a palindrome (2296556922).

The spelling of 1221055701 in words is "one billion, two hundred twenty-one million, fifty-five thousand, seven hundred one".