1012721149420 has 24 divisors (see below), whose sum is σ = 2128417200000. Its totient is φ = 404764119552.

The previous prime is 1012721149409. The next prime is 1012721149421. The reversal of 1012721149420 is 249411272101.

It is not an unprimeable number, because it can be changed into a prime (1012721149421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20245660 + ... + 20295619.

It is an arithmetic number, because the mean of its divisors is an integer number (88684050000).

Almost surely, 2^{1012721149420} is an apocalyptic number.

1012721149420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012721149420 is an abundant number, since it is smaller than the sum of its proper divisors (1115696050580).

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

1012721149420 is a wasteful number, since it uses less digits than its factorization.

1012721149420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40542537 (or 40542535 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 1012721149420 in words is "one trillion, twelve billion, seven hundred twenty-one million, one hundred forty-nine thousand, four hundred twenty".