31049121286821 has 16 divisors (see below), whose sum is σ = 45162642451968. Its totient is φ = 18817530841200.

The previous prime is 31049121286811. The next prime is 31049121286831. The reversal of 31049121286821 is 12868212194013.

It is an interprime number because it is at equal distance from previous prime (31049121286811) and next prime (31049121286831).

It is not a de Polignac number, because 31049121286821 - 2⁵ = 31049121286789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31049121286811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2513680 + ... + 8271446.

It is an arithmetic number, because the mean of its divisors is an integer number (2822665153248).

Almost surely, 2^{31049121286821} is an apocalyptic number.

It is an amenable number.

31049121286821 is a deficient number, since it is larger than the sum of its proper divisors (14113521165147).

31049121286821 is a wasteful number, since it uses less digits than its factorization.

31049121286821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921192.

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 31049121286821 in words is "thirty-one trillion, forty-nine billion, one hundred twenty-one million, two hundred eighty-six thousand, eight hundred twenty-one".