1021131010121 has 4 divisors (see below), whose sum is σ = 1031241218244. Its totient is φ = 1011020802000.

The previous prime is 1021131010103. The next prime is 1021131010127. The reversal of 1021131010121 is 1210101311201.

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 902378404096 + 118752606025 = 949936^2 + 344605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021131010121 - 2¹⁸ = 1021130747977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021131010096 and 1021131010105.

It is not an unprimeable number, because it can be changed into a prime (1021131010127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055103910 + ... + 5055104111.

It is an arithmetic number, because the mean of its divisors is an integer number (257810304561).

Almost surely, 2^{1021131010121} is an apocalyptic number.

It is an amenable number.

1021131010121 is a deficient number, since it is larger than the sum of its proper divisors (10110208123).

1021131010121 is a wasteful number, since it uses less digits than its factorization.

1021131010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110208122.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1021131010121 its reverse (1210101311201), we get a palindrome (2231232321322).

The spelling of 1021131010121 in words is "one trillion, twenty-one billion, one hundred thirty-one million, ten thousand, one hundred twenty-one".