1000131220121 has 4 divisors (see below), whose sum is σ = 1091052240144. Its totient is φ = 909210200100.

The previous prime is 1000131220061. The next prime is 1000131220159. The reversal of 1000131220121 is 1210221310001.

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 1000131220121 - 2²² = 1000127025817 is a prime.

It is a super-3 number, since 3×1000131220121³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000131220096 and 1000131220105.

It is not an unprimeable number, because it can be changed into a prime (1000131220321) 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, 45460509995 + ... + 45460510016.

It is an arithmetic number, because the mean of its divisors is an integer number (272763060036).

Almost surely, 2^{1000131220121} is an apocalyptic number.

1000131220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000131220121 is a deficient number, since it is larger than the sum of its proper divisors (90921020023).

1000131220121 is an equidigital number, since it uses as much as digits as its factorization.

1000131220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90921020022.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1000131220121 its reverse (1210221310001), we get a palindrome (2210352530122).

The spelling of 1000131220121 in words is "one trillion, one hundred thirty-one million, two hundred twenty thousand, one hundred twenty-one".