1201121564 has 6 divisors (see below), whose sum is σ = 2101962744. Its totient is φ = 600560780.

The previous prime is 1201121561. The next prime is 1201121569. The reversal of 1201121564 is 4651211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201121561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150140192 + ... + 150140199.

It is an arithmetic number, because the mean of its divisors is an integer number (350327124).

Almost surely, 2^1201121564 is an apocalyptic number.

It is an amenable number.

1201121564 is a deficient number, since it is larger than the sum of its proper divisors (900841180).

1201121564 is a wasteful number, since it uses less digits than its factorization.

1201121564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300280395 (or 300280393 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1201121564 is about 34657.2007525132. The cubic root of 1201121564 is about 1062.9895326481.

Adding to 1201121564 its reverse (4651211021), we get a palindrome (5852332585).

The spelling of 1201121564 in words is "one billion, two hundred one million, one hundred twenty-one thousand, five hundred sixty-four".