1020112121021 has 8 divisors (see below), whose sum is σ = 1166029878144. Its totient is φ = 874241227440.

The previous prime is 1020112120949. The next prime is 1020112121029. The reversal of 1020112121021 is 1201212110201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020112121021 - 2²⁶ = 1020045012157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020112120987 and 1020112121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020112121029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11669225 + ... + 11756318.

It is an arithmetic number, because the mean of its divisors is an integer number (145753734768).

Almost surely, 2^{1020112121021} is an apocalyptic number.

It is an amenable number.

1020112121021 is a deficient number, since it is larger than the sum of its proper divisors (145917757123).

1020112121021 is an equidigital number, since it uses as much as digits as its factorization.

1020112121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23431771.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1020112121021 its reverse (1201212110201), we get a palindrome (2221324231222).

The spelling of 1020112121021 in words is "one trillion, twenty billion, one hundred twelve million, one hundred twenty-one thousand, twenty-one".