1021012726745 has 16 divisors (see below), whose sum is σ = 1382688083520. Its totient is φ = 716949374400.

The previous prime is 1021012726729. The next prime is 1021012726813. The reversal of 1021012726745 is 5476272101201.

It is a happy number.

It is not a de Polignac number, because 1021012726745 - 2⁴ = 1021012726729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021012726699 and 1021012726708.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320065091 + ... + 320068280.

It is an arithmetic number, because the mean of its divisors is an integer number (86418005220).

Almost surely, 2^{1021012726745} is an apocalyptic number.

It is an amenable number.

1021012726745 is a deficient number, since it is larger than the sum of its proper divisors (361675356775).

1021012726745 is a wasteful number, since it uses less digits than its factorization.

1021012726745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640133416.

The product of its (nonzero) digits is 47040, while the sum is 38.

Adding to 1021012726745 its reverse (5476272101201), we get a palindrome (6497284827946).

The spelling of 1021012726745 in words is "one trillion, twenty-one billion, twelve million, seven hundred twenty-six thousand, seven hundred forty-five".