121024400442 has 64 divisors (see below), whose sum is σ = 275972659200. Its totient is φ = 35023665600.

The previous prime is 121024400429. The next prime is 121024400501. The reversal of 121024400442 is 244004420121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 894684 + ... + 1021032.

It is an arithmetic number, because the mean of its divisors is an integer number (4312072800).

Almost surely, 2^121024400442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121024400442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137986329600).

121024400442 is an abundant number, since it is smaller than the sum of its proper divisors (154948258758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121024400442 is a wasteful number, since it uses less digits than its factorization.

121024400442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127019.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 121024400442 its reverse (244004420121), we get a palindrome (365028820563).

The spelling of 121024400442 in words is "one hundred twenty-one billion, twenty-four million, four hundred thousand, four hundred forty-two".