2101220021051 has 2 divisors, whose sum is σ = 2101220021052. Its totient is φ = 2101220021050.

The previous prime is 2101220021029. The next prime is 2101220021057. The reversal of 2101220021051 is 1501200221012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101220021051 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101220021057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050610010525 + 1050610010526.

It is an arithmetic number, because the mean of its divisors is an integer number (1050610010526).

Almost surely, 2^{2101220021051} is an apocalyptic number.

2101220021051 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101220021051 is an equidigital number, since it uses as much as digits as its factorization.

2101220021051 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 17.

Adding to 2101220021051 its reverse (1501200221012), we get a palindrome (3602420242063).

The spelling of 2101220021051 in words is "two trillion, one hundred one billion, two hundred twenty million, twenty-one thousand, fifty-one".