1021121016 has 16 divisors (see below), whose sum is σ = 2552802600. Its totient is φ = 340373664.

The previous prime is 1021120987. The next prime is 1021121033. The reversal of 1021121016 is 6101211201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021120986 and 1021121004.

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 in 3 ways as a sum of consecutive naturals, for example, 21273331 + ... + 21273378.

Almost surely, 2^1021121016 is an apocalyptic number.

It is an amenable number.

1021121016 is an abundant number, since it is smaller than the sum of its proper divisors (1531681584).

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

1021121016 is a wasteful number, since it uses less digits than its factorization.

1021121016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42546718 (or 42546714 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1021121016 is about 31954.9842121695. The cubic root of 1021121016 is about 1006.9913458402.

Adding to 1021121016 its reverse (6101211201), we get a palindrome (7122332217).

The spelling of 1021121016 in words is "one billion, twenty-one million, one hundred twenty-one thousand, sixteen".