1021100651121 has 8 divisors (see below), whose sum is σ = 1361780030464. Its totient is φ = 680577519600.

The previous prime is 1021100651119. The next prime is 1021100651161. The reversal of 1021100651121 is 1211560011201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1021100651121 - 2¹ = 1021100651119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021100651161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39046705 + ... + 39072846.

It is an arithmetic number, because the mean of its divisors is an integer number (170222503808).

Almost surely, 2^{1021100651121} is an apocalyptic number.

It is an amenable number.

1021100651121 is a deficient number, since it is larger than the sum of its proper divisors (340679379343).

1021100651121 is an equidigital number, since it uses as much as digits as its factorization.

1021100651121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78123911.

The product of its (nonzero) digits is 120, while the sum is 21.

Adding to 1021100651121 its reverse (1211560011201), we get a palindrome (2232660662322).

The spelling of 1021100651121 in words is "one trillion, twenty-one billion, one hundred million, six hundred fifty-one thousand, one hundred twenty-one".