121442406644 has 24 divisors (see below), whose sum is σ = 228883792200. Its totient is φ = 56047509504.

The previous prime is 121442406637. The next prime is 121442406667. The reversal of 121442406644 is 446604244121.

It can be written as a sum of positive squares in 4 ways, for example, as 1718102500 + 119724304144 = 41450^2 + 346012^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121442406598 and 121442406607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261532 + ... + 1354380.

It is an arithmetic number, because the mean of its divisors is an integer number (9536824675).

Almost surely, 2^121442406644 is an apocalyptic number.

It is an amenable number.

121442406644 is a deficient number, since it is larger than the sum of its proper divisors (107441385556).

121442406644 is a wasteful number, since it uses less digits than its factorization.

121442406644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118019 (or 118017 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 38.

The spelling of 121442406644 in words is "one hundred twenty-one billion, four hundred forty-two million, four hundred six thousand, six hundred forty-four".