61001121253 has 2 divisors, whose sum is σ = 61001121254. Its totient is φ = 61001121252.

The previous prime is 61001121227. The next prime is 61001121257. The reversal of 61001121253 is 35212110016.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55628524449 + 5372596804 = 235857^2 + 73298^2 .

It is a cyclic number.

It is not a de Polignac number, because 61001121253 - 2⁵ = 61001121221 is a prime.

It is a super-2 number, since 2×61001121253² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61001121257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30500560626 + 30500560627.

It is an arithmetic number, because the mean of its divisors is an integer number (30500560627).

Almost surely, 2^61001121253 is an apocalyptic number.

It is an amenable number.

61001121253 is a deficient number, since it is larger than the sum of its proper divisors (1).

61001121253 is an equidigital number, since it uses as much as digits as its factorization.

61001121253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 61001121253 its reverse (35212110016), we get a palindrome (96213231269).

The spelling of 61001121253 in words is "sixty-one billion, one million, one hundred twenty-one thousand, two hundred fifty-three".