1021111121000 has 32 divisors (see below), whose sum is σ = 2389400025480. Its totient is φ = 408444448000.

The previous prime is 1021111120951. The next prime is 1021111121011. The reversal of 1021111121000 is 1211111201.

It can be written as a sum of positive squares in 4 ways, for example, as 567861716356 + 453249404644 = 753566^2 + 673238^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510554561 + ... + 510556560.

Almost surely, 2^{1021111121000} is an apocalyptic number.

1021111121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021111121000 is an abundant number, since it is smaller than the sum of its proper divisors (1368288904480).

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

1021111121000 is a wasteful number, since it uses less digits than its factorization.

1021111121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021111142 (or 1021111128 counting only the distinct ones).

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

Adding to 1021111121000 its reverse (1211111201), we get a palindrome (1022322232201).

The spelling of 1021111121000 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred twenty-one thousand".