1011020219979 has 16 divisors (see below), whose sum is σ = 1680656989440. Its totient is φ = 525205308960.

The previous prime is 1011020219947. The next prime is 1011020220029. The reversal of 1011020219979 is 9799120201101.

It is not a de Polignac number, because 1011020219979 - 2⁵ = 1011020219947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011020219979.

It is not an unprimeable number, because it can be changed into a prime (1011020239979) 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, 2188355224 + ... + 2188355685.

It is an arithmetic number, because the mean of its divisors is an integer number (105041061840).

Almost surely, 2^{1011020219979} is an apocalyptic number.

1011020219979 is a deficient number, since it is larger than the sum of its proper divisors (669636769461).

1011020219979 is a wasteful number, since it uses less digits than its factorization.

1011020219979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4376710930.

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

The spelling of 1011020219979 in words is "one trillion, eleven billion, twenty million, two hundred nineteen thousand, nine hundred seventy-nine".