63121131055 has 16 divisors (see below), whose sum is σ = 77893865280. Its totient is φ = 49068122112.

The previous prime is 63121130957. The next prime is 63121131077. The reversal of 63121131055 is 55013112136.

It is a cyclic number.

It is not a de Polignac number, because 63121131055 - 2¹⁹ = 63120606767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79579 + ... + 364108.

It is an arithmetic number, because the mean of its divisors is an integer number (4868366580).

Almost surely, 2^63121131055 is an apocalyptic number.

63121131055 is a deficient number, since it is larger than the sum of its proper divisors (14772734225).

63121131055 is a wasteful number, since it uses less digits than its factorization.

63121131055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444498.

The product of its (nonzero) digits is 2700, while the sum is 28.

It can be divided in two parts, 631211 and 31055, that added together give a palindrome (662266).

The spelling of 63121131055 in words is "sixty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, fifty-five".