121302131478 has 32 divisors (see below), whose sum is σ = 264671988480. Its totient is φ = 36756444960.

The previous prime is 121302131459. The next prime is 121302131479. The reversal of 121302131478 is 874131203121.

It is a super-2 number, since 2×121302131478² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121302131479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2136583 + ... + 2192621.

It is an arithmetic number, because the mean of its divisors is an integer number (8270999640).

Almost surely, 2^121302131478 is an apocalyptic number.

121302131478 is an abundant number, since it is smaller than the sum of its proper divisors (143369857002).

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

121302131478 is a wasteful number, since it uses less digits than its factorization.

121302131478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88852.

The product of its (nonzero) digits is 8064, while the sum is 33.

Adding to 121302131478 its reverse (874131203121), we get a palindrome (995433334599).

The spelling of 121302131478 in words is "one hundred twenty-one billion, three hundred two million, one hundred thirty-one thousand, four hundred seventy-eight".