121442644 has 12 divisors (see below), whose sum is σ = 213018484. Its totient is φ = 60580224.

The previous prime is 121442641. The next prime is 121442647. The reversal of 121442644 is 446244121.

It is an interprime number because it is at equal distance from previous prime (121442641) and next prime (121442647).

It can be written as a sum of positive squares in 2 ways, for example, as 29052100 + 92390544 = 5390^2 + 9612^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33327 + ... + 36790.

Almost surely, 2^121442644 is an apocalyptic number.

It is an amenable number.

121442644 is a deficient number, since it is larger than the sum of its proper divisors (91575840).

121442644 is a wasteful number, since it uses less digits than its factorization.

121442644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70554 (or 70552 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 121442644 is about 11020.1018144117. The cubic root of 121442644 is about 495.2111387137.

Adding to 121442644 its reverse (446244121), we get a palindrome (567686765).

The spelling of 121442644 in words is "one hundred twenty-one million, four hundred forty-two thousand, six hundred forty-four".