1011020010121 has 4 divisors (see below), whose sum is σ = 1102930920144. Its totient is φ = 919109100100.

The previous prime is 1011020010109. The next prime is 1011020010157. The reversal of 1011020010121 is 1210100201101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011020010121 - 2²¹ = 1011017912969 is a prime.

It is a super-2 number, since 2×1011020010121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011020010098 and 1011020010107.

It is not an unprimeable number, because it can be changed into a prime (1011020011121) 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, 45955454995 + ... + 45955455016.

It is an arithmetic number, because the mean of its divisors is an integer number (275732730036).

Almost surely, 2^{1011020010121} is an apocalyptic number.

1011020010121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011020010121 is a deficient number, since it is larger than the sum of its proper divisors (91910910023).

1011020010121 is an equidigital number, since it uses as much as digits as its factorization.

1011020010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91910910022.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1011020010121 its reverse (1210100201101), we get a palindrome (2221120211222).

The spelling of 1011020010121 in words is "one trillion, eleven billion, twenty million, ten thousand, one hundred twenty-one".