1021200119979 has 16 divisors (see below), whose sum is σ = 1466361429792. Its totient is φ = 628421073408.

The previous prime is 1021200119897. The next prime is 1021200119987. The reversal of 1021200119979 is 9799110021201.

1021200119979 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1021200119979 - 2¹⁶ = 1021200054443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021200119979.

It is not an unprimeable number, because it can be changed into a prime (1021200115979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2959507 + ... + 3286499.

It is an arithmetic number, because the mean of its divisors is an integer number (91647589362).

Almost surely, 2^{1021200119979} is an apocalyptic number.

1021200119979 is a deficient number, since it is larger than the sum of its proper divisors (445161309813).

1021200119979 is a wasteful number, since it uses less digits than its factorization.

1021200119979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407086.

The product of its (nonzero) digits is 20412, while the sum is 42.

The spelling of 1021200119979 in words is "one trillion, twenty-one billion, two hundred million, one hundred nineteen thousand, nine hundred seventy-nine".