1020605215121 has 8 divisors (see below), whose sum is σ = 1048282797504. Its totient is φ = 992932562160.

The previous prime is 1020605214949. The next prime is 1020605215141. The reversal of 1020605215121 is 1215125060201.

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 1020605215121 - 2¹⁸ = 1020604952977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020605215141) 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, 810725 + ... + 1642706.

It is an arithmetic number, because the mean of its divisors is an integer number (131035349688).

Almost surely, 2^{1020605215121} is an apocalyptic number.

It is an amenable number.

1020605215121 is a deficient number, since it is larger than the sum of its proper divisors (27677582383).

1020605215121 is a wasteful number, since it uses less digits than its factorization.

1020605215121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464711.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 1020605215121 in words is "one trillion, twenty billion, six hundred five million, two hundred fifteen thousand, one hundred twenty-one".