21122000202111 has 32 divisors (see below), whose sum is σ = 28393489720320. Its totient is φ = 13966535545344.

The previous prime is 21122000202071. The next prime is 21122000202131. The reversal of 21122000202111 is 11120200022112.

It is not a de Polignac number, because 21122000202111 - 2³¹ = 21119852718463 is a prime.

It is a super-2 number, since 2×21122000202111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122000202131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158622586 + ... + 158755688.

It is an arithmetic number, because the mean of its divisors is an integer number (887296553760).

Almost surely, 2^{21122000202111} is an apocalyptic number.

21122000202111 is a deficient number, since it is larger than the sum of its proper divisors (7271489518209).

21122000202111 is a wasteful number, since it uses less digits than its factorization.

21122000202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134255.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21122000202111 its reverse (11120200022112), we get a palindrome (32242200224223).

The spelling of 21122000202111 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred two thousand, one hundred eleven".