1021101219999 has 48 divisors (see below), whose sum is σ = 1788082021440. Its totient is φ = 548148280320.

The previous prime is 1021101219979. The next prime is 1021101220003. The reversal of 1021101219999 is 9999121011201.

It is not a de Polignac number, because 1021101219999 - 2⁵ = 1021101219967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021101219979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 301744 + ... + 1460565.

It is an arithmetic number, because the mean of its divisors is an integer number (37251708780).

Almost surely, 2^{1021101219999} is an apocalyptic number.

1021101219999 is a deficient number, since it is larger than the sum of its proper divisors (766980801441).

1021101219999 is a wasteful number, since it uses less digits than its factorization.

1021101219999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762880 (or 1762877 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 45.

It can be divided in two parts, 1021101 and 219999, that added together give a triangular number (1241100 = T₁₅₇₅).

The spelling of 1021101219999 in words is "one trillion, twenty-one billion, one hundred one million, two hundred nineteen thousand, nine hundred ninety-nine".