1001221212131 has 8 divisors (see below), whose sum is σ = 1144610083584. Its totient is φ = 857921658120.

The previous prime is 1001221212097. The next prime is 1001221212133. The reversal of 1001221212131 is 1312121221001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1001221212131 - 2²⁶ = 1001154103267 is a prime.

It is a super-2 number, since 2×1001221212131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001221212133) 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, 22305335 + ... + 22350176.

It is an arithmetic number, because the mean of its divisors is an integer number (143076260448).

Almost surely, 2^{1001221212131} is an apocalyptic number.

1001221212131 is a deficient number, since it is larger than the sum of its proper divisors (143388871453).

1001221212131 is an equidigital number, since it uses as much as digits as its factorization.

1001221212131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44658721.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1001221212131 its reverse (1312121221001), we get a palindrome (2313342433132).

The spelling of 1001221212131 in words is "one trillion, one billion, two hundred twenty-one million, two hundred twelve thousand, one hundred thirty-one".