221121011051 has 2 divisors, whose sum is σ = 221121011052. Its totient is φ = 221121011050.

The previous prime is 221121011003. The next prime is 221121011063. The reversal of 221121011051 is 150110121122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221121011051 - 2⁶ = 221121010987 is a prime.

It is not a weakly prime, because it can be changed into another prime (221121011351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560505525 + 110560505526.

It is an arithmetic number, because the mean of its divisors is an integer number (110560505526).

Almost surely, 2^221121011051 is an apocalyptic number.

221121011051 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121011051 is an equidigital number, since it uses as much as digits as its factorization.

221121011051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 221121011051 its reverse (150110121122), we get a palindrome (371231132173).

The spelling of 221121011051 in words is "two hundred twenty-one billion, one hundred twenty-one million, eleven thousand, fifty-one".