1021202009979 has 16 divisors (see below), whose sum is σ = 1393915366272. Its totient is φ = 664659713088.

The previous prime is 1021202009969. The next prime is 1021202010061. The reversal of 1021202009979 is 9799002021201.

It is not a de Polignac number, because 1021202009979 - 2³⁶ = 952482533243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021202009979.

It is not an unprimeable number, because it can be changed into a prime (1021202009909) 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, 1560697 + ... + 2116170.

It is an arithmetic number, because the mean of its divisors is an integer number (87119710392).

Almost surely, 2^{1021202009979} is an apocalyptic number.

1021202009979 is a deficient number, since it is larger than the sum of its proper divisors (372713356293).

1021202009979 is a wasteful number, since it uses less digits than its factorization.

1021202009979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3679066.

The product of its (nonzero) digits is 40824, while the sum is 42.

The spelling of 1021202009979 in words is "one trillion, twenty-one billion, two hundred two million, nine thousand, nine hundred seventy-nine".