121431020 has 12 divisors (see below), whose sum is σ = 255005184. Its totient is φ = 48572400.

The previous prime is 121431019. The next prime is 121431031. The reversal of 121431020 is 20134121.

It is a junction number, because it is equal to n+sod(n) for n = 121430986 and 121431004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3035756 + ... + 3035795.

It is an arithmetic number, because the mean of its divisors is an integer number (21250432).

Almost surely, 2^121431020 is an apocalyptic number.

121431020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121431020 is an abundant number, since it is smaller than the sum of its proper divisors (133574164).

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

121431020 is a wasteful number, since it uses less digits than its factorization.

121431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6071560 (or 6071558 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 121431020 is about 11019.5744019449. The cubic root of 121431020 is about 495.1953383387.

Adding to 121431020 its reverse (20134121), we get a palindrome (141565141).

The spelling of 121431020 in words is "one hundred twenty-one million, four hundred thirty-one thousand, twenty".