21122010012111 has 32 divisors (see below), whose sum is σ = 30908944889856. Its totient is φ = 12772290816000.

The previous prime is 21122010012109. The next prime is 21122010012127. The reversal of 21122010012111 is 11121001022112.

It is a happy number.

It is not a de Polignac number, because 21122010012111 - 2¹ = 21122010012109 is a prime.

It is a super-2 number, since 2×21122010012111² (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 (21122010012151) 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, 27336625 + ... + 28098666.

It is an arithmetic number, because the mean of its divisors is an integer number (965904527808).

Almost surely, 2^{21122010012111} is an apocalyptic number.

21122010012111 is a deficient number, since it is larger than the sum of its proper divisors (9786934877745).

21122010012111 is a wasteful number, since it uses less digits than its factorization.

21122010012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55435583.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21122010012111 its reverse (11121001022112), we get a palindrome (32243011034223).

The spelling of 21122010012111 in words is "twenty-one trillion, one hundred twenty-two billion, ten million, twelve thousand, one hundred eleven".