20212122002111 has 4 divisors (see below), whose sum is σ = 21766900617672. Its totient is φ = 18657343386552.

The previous prime is 20212122002087. The next prime is 20212122002117. The reversal of 20212122002111 is 11120022121202.

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

It is not a de Polignac number, because 20212122002111 - 2¹⁰ = 20212122001087 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 20212122002111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212122002117) 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, 777389307761 + ... + 777389307786.

It is an arithmetic number, because the mean of its divisors is an integer number (5441725154418).

Almost surely, 2^{20212122002111} is an apocalyptic number.

20212122002111 is a deficient number, since it is larger than the sum of its proper divisors (1554778615561).

20212122002111 is a wasteful number, since it uses less digits than its factorization.

20212122002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554778615560.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20212122002111 its reverse (11120022121202), we get a palindrome (31332144123313).

The spelling of 20212122002111 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-two million, two thousand, one hundred eleven".