1201982881 has 8 divisors (see below), whose sum is σ = 1330825824. Its totient is φ = 1076401920.

The previous prime is 1201982879. The next prime is 1201982897. The reversal of 1201982881 is 1882891021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1201982881 - 2¹ = 1201982879 is a prime.

It is a super-2 number, since 2×1201982881² = 2889525692434120322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1201982861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814720 + ... + 816193.

It is an arithmetic number, because the mean of its divisors is an integer number (166353228).

Almost surely, 2^1201982881 is an apocalyptic number.

1201982881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201982881 is a deficient number, since it is larger than the sum of its proper divisors (128842943).

1201982881 is a wasteful number, since it uses less digits than its factorization.

1201982881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630991.

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 1201982881 is about 34669.6247600115. The cubic root of 1201982881 is about 1063.2435597230.

The spelling of 1201982881 in words is "one billion, two hundred one million, nine hundred eighty-two thousand, eight hundred eighty-one".