1021211102111 has 4 divisors (see below), whose sum is σ = 1031322103224. Its totient is φ = 1011100101000.

The previous prime is 1021211102101. The next prime is 1021211102113. The reversal of 1021211102111 is 1112011121201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1021211102111 - 2⁶ = 1021211102047 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 (1021211102113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055500405 + ... + 5055500606.

It is an arithmetic number, because the mean of its divisors is an integer number (257830525806).

Almost surely, 2^{1021211102111} is an apocalyptic number.

1021211102111 is a deficient number, since it is larger than the sum of its proper divisors (10111001113).

1021211102111 is a wasteful number, since it uses less digits than its factorization.

1021211102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111001112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1021211102111 its reverse (1112011121201), we get a palindrome (2133222223312).

The spelling of 1021211102111 in words is "one trillion, twenty-one billion, two hundred eleven million, one hundred two thousand, one hundred eleven".