101210121982 has 4 divisors (see below), whose sum is σ = 151815182976. Its totient is φ = 50605060990.

The previous prime is 101210121977. The next prime is 101210121983. The reversal of 101210121982 is 289121012101.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×101210121982² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 101210121982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210121983) 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 as a sum of consecutive naturals, namely, 25302530494 + ... + 25302530497.

It is an arithmetic number, because the mean of its divisors is an integer number (37953795744).

Almost surely, 2^101210121982 is an apocalyptic number.

101210121982 is a deficient number, since it is larger than the sum of its proper divisors (50605060994).

101210121982 is an equidigital number, since it uses as much as digits as its factorization.

101210121982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50605060993.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 101210121982 in words is "one hundred one billion, two hundred ten million, one hundred twenty-one thousand, nine hundred eighty-two".