221000101051 has 2 divisors, whose sum is σ = 221000101052. Its totient is φ = 221000101050.

The previous prime is 221000101043. The next prime is 221000101079. The reversal of 221000101051 is 150101000122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221000101051 - 2³ = 221000101043 is a prime.

It is a super-2 number, since 2×221000101051² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221000101001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500050525 + 110500050526.

It is an arithmetic number, because the mean of its divisors is an integer number (110500050526).

Almost surely, 2^221000101051 is an apocalyptic number.

221000101051 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000101051 is an equidigital number, since it uses as much as digits as its factorization.

221000101051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

Adding to 221000101051 its reverse (150101000122), we get a palindrome (371101101173).

The spelling of 221000101051 in words is "two hundred twenty-one billion, one hundred one thousand, fifty-one".