1021201022111 has 4 divisors (see below), whose sum is σ = 1021221044712. Its totient is φ = 1021180999512.

The previous prime is 1021201022099. The next prime is 1021201022213. The reversal of 1021201022111 is 1112201021201.

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 1021201022111 - 2³⁰ = 1020127280287 is a prime.

It is a super-2 number, since 2×1021201022111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021201021111) 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, 9934601 + ... + 10036866.

It is an arithmetic number, because the mean of its divisors is an integer number (255305261178).

Almost surely, 2^{1021201022111} is an apocalyptic number.

1021201022111 is a deficient number, since it is larger than the sum of its proper divisors (20022601).

1021201022111 is an equidigital number, since it uses as much as digits as its factorization.

1021201022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20022600.

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

Adding to 1021201022111 its reverse (1112201021201), we get a palindrome (2133402043312).

The spelling of 1021201022111 in words is "one trillion, twenty-one billion, two hundred one million, twenty-two thousand, one hundred eleven".