2121012031031 has 8 divisors (see below), whose sum is σ = 2121885255600. Its totient is φ = 2120138919360.

The previous prime is 2121012031007. The next prime is 2121012031043. The reversal of 2121012031031 is 1301302101212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121012031031 is a prime.

It is a super-2 number, since 2×2121012031031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121012039031) 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, 76999121 + ... + 77026661.

It is an arithmetic number, because the mean of its divisors is an integer number (265235656950).

Almost surely, 2^{2121012031031} is an apocalyptic number.

2121012031031 is a deficient number, since it is larger than the sum of its proper divisors (873224569).

2121012031031 is a wasteful number, since it uses less digits than its factorization.

2121012031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56449.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 2121012031031 its reverse (1301302101212), we get a palindrome (3422314132243).

The spelling of 2121012031031 in words is "two trillion, one hundred twenty-one billion, twelve million, thirty-one thousand, thirty-one".