20101220111982 has 8 divisors (see below), whose sum is σ = 40202440223976. Its totient is φ = 6700406703992.

The previous prime is 20101220111953. The next prime is 20101220111989. The reversal of 20101220111982 is 28911102210102.

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

20101220111982 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101220111989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1675101675993 + ... + 1675101676004.

It is an arithmetic number, because the mean of its divisors is an integer number (5025305027997).

Almost surely, 2^{20101220111982} is an apocalyptic number.

20101220111982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20101220111982 is a wasteful number, since it uses less digits than its factorization.

20101220111982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3350203352002.

The product of its (nonzero) digits is 1152, while the sum is 30.

The spelling of 20101220111982 in words is "twenty trillion, one hundred one billion, two hundred twenty million, one hundred eleven thousand, nine hundred eighty-two".