1021210221101 has 32 divisors (see below), whose sum is σ = 1186264645632. Its totient is φ = 861075895680.

The previous prime is 1021210221079. The next prime is 1021210221127. The reversal of 1021210221101 is 1011220121201.

It is a de Polignac number, because none of the positive numbers 2^k-1021210221101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210221191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173171585 + ... + 173177481.

It is an arithmetic number, because the mean of its divisors is an integer number (37070770176).

Almost surely, 2^{1021210221101} is an apocalyptic number.

It is an amenable number.

1021210221101 is a deficient number, since it is larger than the sum of its proper divisors (165054424531).

1021210221101 is a wasteful number, since it uses less digits than its factorization.

1021210221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7649.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1021210221101 its reverse (1011220121201), we get a palindrome (2032430342302).

The spelling of 1021210221101 in words is "one trillion, twenty-one billion, two hundred ten million, two hundred twenty-one thousand, one hundred one".