1021979464899 has 8 divisors (see below), whose sum is σ = 1362644678160. Its totient is φ = 681316947456.

The previous prime is 1021979464897. The next prime is 1021979464907. The reversal of 1021979464899 is 9984649791201.

It is a Cunningham number, because it is equal to 1010930²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021979464899 - 2¹ = 1021979464897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021979464897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 505467 + ... + 1516395.

It is an arithmetic number, because the mean of its divisors is an integer number (170330584770).

Almost surely, 2^{1021979464899} is an apocalyptic number.

1021979464899 is a deficient number, since it is larger than the sum of its proper divisors (340665213261).

1021979464899 is a wasteful number, since it uses less digits than its factorization.

1021979464899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347909.

The product of its (nonzero) digits is 70543872, while the sum is 69.

The spelling of 1021979464899 in words is "one trillion, twenty-one billion, nine hundred seventy-nine million, four hundred sixty-four thousand, eight hundred ninety-nine".