21121110022211 has 2 divisors, whose sum is σ = 21121110022212. Its totient is φ = 21121110022210.

The previous prime is 21121110022147. The next prime is 21121110022351. The reversal of 21121110022211 is 11222001112112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121110022211 - 2⁶ = 21121110022147 is a prime.

It is a super-2 number, since 2×21121110022211² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21121110022211.

It is not a weakly prime, because it can be changed into another prime (21121110027211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560555011105 + 10560555011106.

It is an arithmetic number, because the mean of its divisors is an integer number (10560555011106).

Almost surely, 2^{21121110022211} is an apocalyptic number.

21121110022211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121110022211 is an equidigital number, since it uses as much as digits as its factorization.

21121110022211 is an evil number, because the sum of its binary digits is even.

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

Adding to 21121110022211 its reverse (11222001112112), we get a palindrome (32343111134323).

The spelling of 21121110022211 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, twenty-two thousand, two hundred eleven".