22121202011111 has 16 divisors (see below), whose sum is σ = 25294513609728. Its totient is φ = 18951177312000.

The previous prime is 22121202011107. The next prime is 22121202011123. The reversal of 22121202011111 is 11111020212122.

It is a cyclic number.

It is not a de Polignac number, because 22121202011111 - 2² = 22121202011107 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 22121202011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121202011171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147477431 + ... + 147627351.

It is an arithmetic number, because the mean of its divisors is an integer number (1580907100608).

Almost surely, 2^{22121202011111} is an apocalyptic number.

22121202011111 is a deficient number, since it is larger than the sum of its proper divisors (3173311598617).

22121202011111 is a wasteful number, since it uses less digits than its factorization.

22121202011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160742.

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

Adding to 22121202011111 its reverse (11111020212122), we get a palindrome (33232222223233).

The spelling of 22121202011111 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred two million, eleven thousand, one hundred eleven".