1020979221 has 16 divisors (see below), whose sum is σ = 1403298048. Its totient is φ = 659793600.

The previous prime is 1020979199. The next prime is 1020979273. The reversal of 1020979221 is 1229790201.

It is not a de Polignac number, because 1020979221 - 2¹¹ = 1020977173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020979291) 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, 13111 + ... + 47051.

It is an arithmetic number, because the mean of its divisors is an integer number (87706128).

Almost surely, 2^1020979221 is an apocalyptic number.

It is an amenable number.

1020979221 is a deficient number, since it is larger than the sum of its proper divisors (382318827).

1020979221 is a wasteful number, since it uses less digits than its factorization.

1020979221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34252.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 1020979221 is about 31952.7654671704. The cubic root of 1020979221 is about 1006.9447327077.

The spelling of 1020979221 in words is "one billion, twenty million, nine hundred seventy-nine thousand, two hundred twenty-one".