121442603436 has 72 divisors (see below), whose sum is σ = 382728213504. Its totient is φ = 31543532640.

The previous prime is 121442603423. The next prime is 121442603467. The reversal of 121442603436 is 634306244121.

121442603436 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 4 + 2 + 603 + 43 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 121442603436.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21902460 + ... + 21908003.

It is an arithmetic number, because the mean of its divisors is an integer number (5315669632).

Almost surely, 2^121442603436 is an apocalyptic number.

It is an amenable number.

121442603436 is an abundant number, since it is smaller than the sum of its proper divisors (261285610068).

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

121442603436 is a wasteful number, since it uses less digits than its factorization.

121442603436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43810491 (or 43810486 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

Adding to 121442603436 its reverse (634306244121), we get a palindrome (755748847557).

The spelling of 121442603436 in words is "one hundred twenty-one billion, four hundred forty-two million, six hundred three thousand, four hundred thirty-six".