21220101112051 has 2 divisors, whose sum is σ = 21220101112052. Its totient is φ = 21220101112050.

The previous prime is 21220101111997. The next prime is 21220101112073. The reversal of 21220101112051 is 15021110102212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220101112051 - 2¹¹ = 21220101110003 is a prime.

It is not a weakly prime, because it can be changed into another prime (21220101113051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610050556025 + 10610050556026.

It is an arithmetic number, because the mean of its divisors is an integer number (10610050556026).

Almost surely, 2^{21220101112051} is an apocalyptic number.

21220101112051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220101112051 is an equidigital number, since it uses as much as digits as its factorization.

21220101112051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 19.

Adding to 21220101112051 its reverse (15021110102212), we get a palindrome (36241211214263).

The spelling of 21220101112051 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, one hundred twelve thousand, fifty-one".