121131498280 has 64 divisors (see below), whose sum is σ = 293759706240. Its totient is φ = 44687569152.

The previous prime is 121131498277. The next prime is 121131498307. The reversal of 121131498280 is 82894131121.

121131498280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 519117 + ... + 715363.

It is an arithmetic number, because the mean of its divisors is an integer number (4589995410).

Almost surely, 2^121131498280 is an apocalyptic number.

121131498280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121131498280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146879853120).

121131498280 is an abundant number, since it is smaller than the sum of its proper divisors (172628207960).

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

121131498280 is a wasteful number, since it uses less digits than its factorization.

121131498280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197458 (or 197454 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 121131498280 in words is "one hundred twenty-one billion, one hundred thirty-one million, four hundred ninety-eight thousand, two hundred eighty".