1221148478120 has 32 divisors (see below), whose sum is σ = 2753786337120. Its totient is φ = 487356767040.

The previous prime is 1221148478107. The next prime is 1221148478189. The reversal of 1221148478120 is 218748411221.

It is a super-2 number, since 2×1221148478120² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 34439066 + ... + 34474505.

It is an arithmetic number, because the mean of its divisors is an integer number (86055823035).

Almost surely, 2^{1221148478120} is an apocalyptic number.

1221148478120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221148478120 is an abundant number, since it is smaller than the sum of its proper divisors (1532637859000).

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

1221148478120 is a wasteful number, since it uses less digits than its factorization.

1221148478120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68914025 (or 68914021 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 41.

The spelling of 1221148478120 in words is "one trillion, two hundred twenty-one billion, one hundred forty-eight million, four hundred seventy-eight thousand, one hundred twenty".