1981012101270 has 64 divisors (see below), whose sum is σ = 4940736307200. Its totient is φ = 507797827200.

The previous prime is 1981012101247. The next prime is 1981012101317. The reversal of 1981012101270 is 721012101891.

It is a super-3 number, since 3×1981012101270³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7009486 + ... + 7286625.

It is an arithmetic number, because the mean of its divisors is an integer number (77199004800).

Almost surely, 2^{1981012101270} is an apocalyptic number.

1981012101270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1981012101270 is an abundant number, since it is smaller than the sum of its proper divisors (2959724205930).

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

1981012101270 is a wasteful number, since it uses less digits than its factorization.

1981012101270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14296301.

The product of its (nonzero) digits is 2016, while the sum is 33.

The spelling of 1981012101270 in words is "one trillion, nine hundred eighty-one billion, twelve million, one hundred one thousand, two hundred seventy".