121244133440 has 56 divisors (see below), whose sum is σ = 291689085912. Its totient is φ = 47997665280.

The previous prime is 121244133407. The next prime is 121244133443. The reversal of 121244133440 is 44331442121.

It can be written as a sum of positive squares in 4 ways, for example, as 16987472896 + 104256660544 = 130336^2 + 322888^2 .

It is not an unprimeable number, because it can be changed into a prime (121244133443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1921991 + ... + 1984070.

It is an arithmetic number, because the mean of its divisors is an integer number (5208733677).

Almost surely, 2^121244133440 is an apocalyptic number.

121244133440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121244133440 is an abundant number, since it is smaller than the sum of its proper divisors (170444952472).

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

121244133440 is an equidigital number, since it uses as much as digits as its factorization.

121244133440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3906175 (or 3906165 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 121244133440 its reverse (44331442121), we get a palindrome (165575575561).

The spelling of 121244133440 in words is "one hundred twenty-one billion, two hundred forty-four million, one hundred thirty-three thousand, four hundred forty".