1021210001111 has 8 divisors (see below), whose sum is σ = 1030291060320. Its totient is φ = 1012129710592.

The previous prime is 1021210001107. The next prime is 1021210001167. The reversal of 1021210001111 is 1111000121201.

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

It is a cyclic number.

It is not a de Polignac number, because 1021210001111 - 2² = 1021210001107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021210001092 and 1021210001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021210001011) 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, 2664566 + ... + 3023628.

It is an arithmetic number, because the mean of its divisors is an integer number (128786382540).

Almost surely, 2^{1021210001111} is an apocalyptic number.

1021210001111 is a deficient number, since it is larger than the sum of its proper divisors (9081059209).

1021210001111 is a wasteful number, since it uses less digits than its factorization.

1021210001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384345.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1021210001111 its reverse (1111000121201), we get a palindrome (2132210122312).

The spelling of 1021210001111 in words is "one trillion, twenty-one billion, two hundred ten million, one thousand, one hundred eleven".