1020131255455 has 16 divisors (see below), whose sum is σ = 1348982157600. Its totient is φ = 735808445568.

The previous prime is 1020131255417. The next prime is 1020131255477. The reversal of 1020131255455 is 5545521310201.

It is a cyclic number.

It is not a de Polignac number, because 1020131255455 - 2⁷ = 1020131255327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020131255455.

It is a congruent number.

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, 182489380 + ... + 182494969.

It is an arithmetic number, because the mean of its divisors is an integer number (84311384850).

Almost surely, 2^{1020131255455} is an apocalyptic number.

1020131255455 is a deficient number, since it is larger than the sum of its proper divisors (328850902145).

1020131255455 is a wasteful number, since it uses less digits than its factorization.

1020131255455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364984410.

The product of its (nonzero) digits is 30000, while the sum is 34.

Adding to 1020131255455 its reverse (5545521310201), we get a palindrome (6565652565656).

The spelling of 1020131255455 in words is "one trillion, twenty billion, one hundred thirty-one million, two hundred fifty-five thousand, four hundred fifty-five".