121302451540 has 48 divisors (see below), whose sum is σ = 256232628288. Its totient is φ = 48236408064.

The previous prime is 121302451531. The next prime is 121302451541. The reversal of 121302451540 is 45154203121.

It is a super-2 number, since 2×121302451540² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121302451499 and 121302451508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302451541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2976139 + ... + 3016621.

It is an arithmetic number, because the mean of its divisors is an integer number (5338179756).

Almost surely, 2^121302451540 is an apocalyptic number.

121302451540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121302451540 is an abundant number, since it is smaller than the sum of its proper divisors (134930176748).

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

121302451540 is a wasteful number, since it uses less digits than its factorization.

121302451540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41368 (or 41366 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 121302451540 its reverse (45154203121), we get a palindrome (166456654661).

The spelling of 121302451540 in words is "one hundred twenty-one billion, three hundred two million, four hundred fifty-one thousand, five hundred forty".