121644144262 has 4 divisors (see below), whose sum is σ = 182466216396. Its totient is φ = 60822072130.

The previous prime is 121644144257. The next prime is 121644144269. The reversal of 121644144262 is 262441446121.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121644144269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30411036064 + ... + 30411036067.

It is an arithmetic number, because the mean of its divisors is an integer number (45616554099).

Almost surely, 2^121644144262 is an apocalyptic number.

121644144262 is a deficient number, since it is larger than the sum of its proper divisors (60822072134).

121644144262 is an equidigital number, since it uses as much as digits as its factorization.

121644144262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60822072133.

The product of its digits is 73728, while the sum is 37.

The spelling of 121644144262 in words is "one hundred twenty-one billion, six hundred forty-four million, one hundred forty-four thousand, two hundred sixty-two".