1021161221016 has 32 divisors (see below), whose sum is σ = 2560217982000. Its totient is φ = 339411749760.

The previous prime is 1021161220979. The next prime is 1021161221051. The reversal of 1021161221016 is 6101221611201.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60949195 + ... + 60965946.

Almost surely, 2^{1021161221016} is an apocalyptic number.

It is an amenable number.

1021161221016 is an abundant number, since it is smaller than the sum of its proper divisors (1539056760984).

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

1021161221016 is a wasteful number, since it uses less digits than its factorization.

1021161221016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121915499 (or 121915495 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 1021161221016 its reverse (6101221611201), we get a palindrome (7122382832217).

The spelling of 1021161221016 in words is "one trillion, twenty-one billion, one hundred sixty-one million, two hundred twenty-one thousand, sixteen".