10021211222111 has 4 divisors (see below), whose sum is σ = 10366770229800. Its totient is φ = 9675652214424.

The previous prime is 10021211222101. The next prime is 10021211222129. The reversal of 10021211222111 is 11122211212001.

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 10021211222111 - 2¹⁸ = 10021210959967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10021211222111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021211222101) 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, 172779503801 + ... + 172779503858.

It is an arithmetic number, because the mean of its divisors is an integer number (2591692557450).

Almost surely, 2^{10021211222111} is an apocalyptic number.

10021211222111 is a deficient number, since it is larger than the sum of its proper divisors (345559007689).

10021211222111 is an equidigital number, since it uses as much as digits as its factorization.

10021211222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345559007688.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 10021211222111 its reverse (11122211212001), we get a palindrome (21143422434112).

The spelling of 10021211222111 in words is "ten trillion, twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".