1021000211121 has 16 divisors (see below), whose sum is σ = 1549660400640. Its totient is φ = 591884179920.

The previous prime is 1021000211117. The next prime is 1021000211219. The reversal of 1021000211121 is 1211120001201.

It is not a de Polignac number, because 1021000211121 - 2² = 1021000211117 is a prime.

It is a super-2 number, since 2×1021000211121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1021000211097 and 1021000211106.

It is not an unprimeable number, because it can be changed into a prime (1021000210121) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 672594901 + ... + 672596418.

It is an arithmetic number, because the mean of its divisors is an integer number (96853775040).

Almost surely, 2^{1021000211121} is an apocalyptic number.

1021000211121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1021000211121 is a deficient number, since it is larger than the sum of its proper divisors (528660189519).

1021000211121 is a wasteful number, since it uses less digits than its factorization.

1021000211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345191356.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1021000211121 its reverse (1211120001201), we get a palindrome (2232120212322).

The spelling of 1021000211121 in words is "one trillion, twenty-one billion, two hundred eleven thousand, one hundred twenty-one".