101221019983 has 4 divisors (see below), whose sum is σ = 104486214208. Its totient is φ = 97955825760.

The previous prime is 101221019929. The next prime is 101221020011. The reversal of 101221019983 is 389910122101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221019983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221013983) 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, 1632597066 + ... + 1632597127.

It is an arithmetic number, because the mean of its divisors is an integer number (26121553552).

Almost surely, 2^101221019983 is an apocalyptic number.

101221019983 is a deficient number, since it is larger than the sum of its proper divisors (3265194225).

101221019983 is an equidigital number, since it uses as much as digits as its factorization.

101221019983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265194224.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 101221019983 in words is "one hundred one billion, two hundred twenty-one million, nineteen thousand, nine hundred eighty-three".