12121277653 has 2 divisors, whose sum is σ = 12121277654. Its totient is φ = 12121277652.

The previous prime is 12121277617. The next prime is 12121277689. The reversal of 12121277653 is 35677212121.

It is a balanced prime because it is at equal distance from previous prime (12121277617) and next prime (12121277689).

It can be written as a sum of positive squares in only one way, i.e., 9458924049 + 2662353604 = 97257^2 + 51598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121277653 is a prime.

It is a super-2 number, since 2×12121277653² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121277053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060638826 + 6060638827.

It is an arithmetic number, because the mean of its divisors is an integer number (6060638827).

Almost surely, 2^12121277653 is an apocalyptic number.

It is an amenable number.

12121277653 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121277653 is an equidigital number, since it uses as much as digits as its factorization.

12121277653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

Adding to 12121277653 its reverse (35677212121), we get a palindrome (47798489774).

The spelling of 12121277653 in words is "twelve billion, one hundred twenty-one million, two hundred seventy-seven thousand, six hundred fifty-three".