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1221031020133 is a prime number
BaseRepresentation
bin10001110001001011000…
…111101100011001100101
311022201200202021121222001
4101301023013230121211
5130001132420121013
62332533420205301
7154134200265361
oct21611307543145
94281622247861
101221031020133
114309221a6871
12178788999831
138b1b1770c12
14431537142a1
1521b66213ddd
hex11c4b1ec665

1221031020133 has 2 divisors, whose sum is σ = 1221031020134. Its totient is φ = 1221031020132.

The previous prime is 1221031020103. The next prime is 1221031020151. The reversal of 1221031020133 is 3310201301221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218069810244 + 2961209889 = 1103662^2 + 54417^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-1221031020133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221031020133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221031020103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610515510066 + 610515510067.

It is an arithmetic number, because the mean of its divisors is an integer number (610515510067).

Almost surely, 21221031020133 is an apocalyptic number.

It is an amenable number.

1221031020133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221031020133 is an equidigital number, since it uses as much as digits as its factorization.

1221031020133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1221031020133 its reverse (3310201301221), we get a palindrome (4531232321354).

The spelling of 1221031020133 in words is "one trillion, two hundred twenty-one billion, thirty-one million, twenty thousand, one hundred thirty-three".