10203231101221 has 2 divisors, whose sum is σ = 10203231101222. Its totient is φ = 10203231101220.

The previous prime is 10203231101183. The next prime is 10203231101263. The reversal of 10203231101221 is 12210113230201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9230021229025 + 973209872196 = 3038095^2 + 986514^2 .

It is a cyclic number.

It is not a de Polignac number, because 10203231101221 - 2¹⁵ = 10203231068453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10203231401221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101615550610 + 5101615550611.

It is an arithmetic number, because the mean of its divisors is an integer number (5101615550611).

Almost surely, 2^{10203231101221} is an apocalyptic number.

It is an amenable number.

10203231101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10203231101221 is an equidigital number, since it uses as much as digits as its factorization.

10203231101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 10203231101221 its reverse (12210113230201), we get a palindrome (22413344331422).

The spelling of 10203231101221 in words is "ten trillion, two hundred three billion, two hundred thirty-one million, one hundred one thousand, two hundred twenty-one".