1021121012 has 6 divisors (see below), whose sum is σ = 1786961778. Its totient is φ = 510560504.

The previous prime is 1021120987. The next prime is 1021121033. The reversal of 1021121012 is 2101211201.

It can be written as a sum of positive squares in only one way, i.e., 726518116 + 294602896 = 26954^2 + 17164^2 .

It is a super-2 number, since 2×1021121012² = 2085376242295808288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021120984 and 1021121002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127640123 + ... + 127640130.

It is an arithmetic number, because the mean of its divisors is an integer number (297826963).

Almost surely, 2^1021121012 is an apocalyptic number.

It is an amenable number.

1021121012 is a deficient number, since it is larger than the sum of its proper divisors (765840766).

1021121012 is a wasteful number, since it uses less digits than its factorization.

1021121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255280257 (or 255280255 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1021121012 is about 31954.9841495814. The cubic root of 1021121012 is about 1006.9913445253.

Adding to 1021121012 its reverse (2101211201), we get a palindrome (3122332213).

The spelling of 1021121012 in words is "one billion, twenty-one million, one hundred twenty-one thousand, twelve".