1030121230921 has 2 divisors, whose sum is σ = 1030121230922. Its totient is φ = 1030121230920.

The previous prime is 1030121230849. The next prime is 1030121230933. The reversal of 1030121230921 is 1290321210301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 993731853321 + 36389377600 = 996861^2 + 190760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030121230921 - 2¹⁵ = 1030121198153 is a prime.

It is a super-2 number, since 2×1030121230921² (a number of 25 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (1030121230951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515060615460 + 515060615461.

It is an arithmetic number, because the mean of its divisors is an integer number (515060615461).

Almost surely, 2^{1030121230921} is an apocalyptic number.

It is an amenable number.

1030121230921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1030121230921 is an equidigital number, since it uses as much as digits as its factorization.

1030121230921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 1030121230921 in words is "one trillion, thirty billion, one hundred twenty-one million, two hundred thirty thousand, nine hundred twenty-one".