1221060052 has 6 divisors (see below), whose sum is σ = 2136855098. Its totient is φ = 610530024.

The previous prime is 1221060019. The next prime is 1221060053. The reversal of 1221060052 is 2500601221.

It can be written as a sum of positive squares in only one way, i.e., 641406276 + 579653776 = 25326^2 + 24076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221060053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152632503 + ... + 152632510.

Almost surely, 2^1221060052 is an apocalyptic number.

It is an amenable number.

1221060052 is a deficient number, since it is larger than the sum of its proper divisors (915795046).

1221060052 is a wasteful number, since it uses less digits than its factorization.

1221060052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305265017 (or 305265015 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1221060052 is about 34943.6696985305. The cubic root of 1221060052 is about 1068.8391206327.

Adding to 1221060052 its reverse (2500601221), we get a palindrome (3721661273).

The spelling of 1221060052 in words is "one billion, two hundred twenty-one million, sixty thousand, fifty-two".