1031213121009 has 8 divisors (see below), whose sum is σ = 1390399714080. Its totient is φ = 679750970976.

The previous prime is 1031213120983. The next prime is 1031213121019. The reversal of 1031213121009 is 9001213121301.

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

It is not a de Polignac number, because 1031213121009 - 2¹⁶ = 1031213055473 is a prime.

It is a super-2 number, since 2×1031213121009² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1031213121009.

It is not an unprimeable number, because it can be changed into a prime (1031213121019) 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, 1931110447 + ... + 1931110980.

It is an arithmetic number, because the mean of its divisors is an integer number (173799964260).

Almost surely, 2^{1031213121009} is an apocalyptic number.

It is an amenable number.

1031213121009 is a deficient number, since it is larger than the sum of its proper divisors (359186593071).

1031213121009 is an equidigital number, since it uses as much as digits as its factorization.

1031213121009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862221519.

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 1031213121009 in words is "one trillion, thirty-one billion, two hundred thirteen million, one hundred twenty-one thousand, nine".