1221010222141 has 2 divisors, whose sum is σ = 1221010222142. Its totient is φ = 1221010222140.

The previous prime is 1221010222093. The next prime is 1221010222193. The reversal of 1221010222141 is 1412220101221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675437422500 + 545572799641 = 821850^2 + 738629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221010222141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221110222141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610505111070 + 610505111071.

It is an arithmetic number, because the mean of its divisors is an integer number (610505111071).

Almost surely, 2^{1221010222141} is an apocalyptic number.

It is an amenable number.

1221010222141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221010222141 is an equidigital number, since it uses as much as digits as its factorization.

1221010222141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1221010222141 its reverse (1412220101221), we get a palindrome (2633230323362).

The spelling of 1221010222141 in words is "one trillion, two hundred twenty-one billion, ten million, two hundred twenty-two thousand, one hundred forty-one".