1021111001012 has 6 divisors (see below), whose sum is σ = 1786944251778. Its totient is φ = 510555500504.

The previous prime is 1021111000999. The next prime is 1021111001041. The reversal of 1021111001012 is 2101001111201.

It can be written as a sum of positive squares in only one way, i.e., 1001868872356 + 19242128656 = 1000934^2 + 138716^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1021111000984 and 1021111001002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127638875123 + ... + 127638875130.

It is an arithmetic number, because the mean of its divisors is an integer number (297824041963).

Almost surely, 2^{1021111001012} is an apocalyptic number.

It is an amenable number.

1021111001012 is a deficient number, since it is larger than the sum of its proper divisors (765833250766).

1021111001012 is a wasteful number, since it uses less digits than its factorization.

1021111001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255277750257 (or 255277750255 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1021111001012 its reverse (2101001111201), we get a palindrome (3122112112213).

The spelling of 1021111001012 in words is "one trillion, twenty-one billion, one hundred eleven million, one thousand, twelve".