10021420111 has 2 divisors, whose sum is σ = 10021420112. Its totient is φ = 10021420110.

The previous prime is 10021420103. The next prime is 10021420153. The reversal of 10021420111 is 11102412001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10021420111 - 2³ = 10021420103 is a prime.

It is a super-2 number, since 2×10021420111² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10021420091 and 10021420100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021420181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010710055 + 5010710056.

It is an arithmetic number, because the mean of its divisors is an integer number (5010710056).

Almost surely, 2^10021420111 is an apocalyptic number.

10021420111 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021420111 is an equidigital number, since it uses as much as digits as its factorization.

10021420111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10021420111 its reverse (11102412001), we get a palindrome (21123832112).

The spelling of 10021420111 in words is "ten billion, twenty-one million, four hundred twenty thousand, one hundred eleven".