1021273211279 has 8 divisors (see below), whose sum is σ = 1031948455440. Its totient is φ = 1010600960256.

The previous prime is 1021273211207. The next prime is 1021273211297. The reversal of 1021273211279 is 9721123721201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1021273211279 - 2²⁸ = 1021004775823 is a prime.

It is a super-2 number, since 2×1021273211279² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021273211579) 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, 59009 + ... + 1430394.

It is an arithmetic number, because the mean of its divisors is an integer number (128993556930).

Almost surely, 2^{1021273211279} is an apocalyptic number.

1021273211279 is a deficient number, since it is larger than the sum of its proper divisors (10675244161).

1021273211279 is an equidigital number, since it uses as much as digits as its factorization.

1021273211279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496569.

The product of its (nonzero) digits is 21168, while the sum is 38.

The spelling of 1021273211279 in words is "one trillion, twenty-one billion, two hundred seventy-three million, two hundred eleven thousand, two hundred seventy-nine".