1021061027778 has 64 divisors (see below), whose sum is σ = 2296123320960. Its totient is φ = 299978380800.

The previous prime is 1021061027747. The next prime is 1021061027873. The reversal of 1021061027778 is 8777201601201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57793 + ... + 1430196.

It is an arithmetic number, because the mean of its divisors is an integer number (35876926890).

Almost surely, 2^{1021061027778} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021061027778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1148061660480).

1021061027778 is an abundant number, since it is smaller than the sum of its proper divisors (1275062293182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021061027778 is a wasteful number, since it uses less digits than its factorization.

1021061027778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488323.

The product of its (nonzero) digits is 65856, while the sum is 42.

Adding to 1021061027778 its reverse (8777201601201), we get a palindrome (9798262628979).

The spelling of 1021061027778 in words is "one trillion, twenty-one billion, sixty-one million, twenty-seven thousand, seven hundred seventy-eight".