20120221120231 has 2 divisors, whose sum is σ = 20120221120232. Its totient is φ = 20120221120230.

The previous prime is 20120221120211. The next prime is 20120221120249. The reversal of 20120221120231 is 13202112202102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20120221120231 - 2¹³ = 20120221112039 is a prime.

It is a super-2 number, since 2×20120221120231² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20120221120199 and 20120221120208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120221120211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060110560115 + 10060110560116.

It is an arithmetic number, because the mean of its divisors is an integer number (10060110560116).

Almost surely, 2^{20120221120231} is an apocalyptic number.

20120221120231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120221120231 is an equidigital number, since it uses as much as digits as its factorization.

20120221120231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20120221120231 its reverse (13202112202102), we get a palindrome (33322333322333).

The spelling of 20120221120231 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred thirty-one".