1030121231021 has 4 divisors (see below), whose sum is σ = 1031230081500. Its totient is φ = 1029012380544.

The previous prime is 1030121230997. The next prime is 1030121231039. The reversal of 1030121231021 is 1201321210301.

1030121231021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 278061109225 + 752060121796 = 527315^2 + 867214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1030121231021 - 2²⁶ = 1030054122157 is a prime.

It is a super-2 number, since 2×1030121231021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1030121231221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554423846 + ... + 554425703.

It is an arithmetic number, because the mean of its divisors is an integer number (257807520375).

Almost surely, 2^{1030121231021} is an apocalyptic number.

It is an amenable number.

1030121231021 is a deficient number, since it is larger than the sum of its proper divisors (1108850479).

1030121231021 is an equidigital number, since it uses as much as digits as its factorization.

1030121231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108850478.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1030121231021 its reverse (1201321210301), we get a palindrome (2231442441322).

The spelling of 1030121231021 in words is "one trillion, thirty billion, one hundred twenty-one million, two hundred thirty-one thousand, twenty-one".