3121247204421 has 16 divisors (see below), whose sum is σ = 4296071669760. Its totient is φ = 2013632152560.

The previous prime is 3121247204419. The next prime is 3121247204423. The reversal of 3121247204421 is 1244027421213.

3121247204421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3121247204419) and next prime (3121247204423).

It is not a de Polignac number, because 3121247204421 - 2¹ = 3121247204419 is a prime.

It is a super-2 number, since 2×3121247204421² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121247204423) 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, 1910226 + ... + 3145068.

It is an arithmetic number, because the mean of its divisors is an integer number (268504479360).

Almost surely, 2^{3121247204421} is an apocalyptic number.

3121247204421 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3121247204421 is a deficient number, since it is larger than the sum of its proper divisors (1174824465339).

3121247204421 is a wasteful number, since it uses less digits than its factorization.

3121247204421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262056.

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 3121247204421 in words is "three trillion, one hundred twenty-one billion, two hundred forty-seven million, two hundred four thousand, four hundred twenty-one".