1021131654344 has 8 divisors (see below), whose sum is σ = 1914621851910. Its totient is φ = 510565827168.

The previous prime is 1021131654343. The next prime is 1021131654401. The reversal of 1021131654344 is 4434561311201.

It can be written as a sum of positive squares in only one way, i.e., 1017536212900 + 3595441444 = 1008730^2 + 59962^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1021131654343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63820728389 + ... + 63820728404.

Almost surely, 2^{1021131654344} is an apocalyptic number.

It is an amenable number.

1021131654344 is a deficient number, since it is larger than the sum of its proper divisors (893490197566).

1021131654344 is a wasteful number, since it uses less digits than its factorization.

1021131654344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127641456799 (or 127641456795 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 1021131654344 its reverse (4434561311201), we get a palindrome (5455692965545).

The spelling of 1021131654344 in words is "one trillion, twenty-one billion, one hundred thirty-one million, six hundred fifty-four thousand, three hundred forty-four".