3101021212121 has 4 divisors (see below), whose sum is σ = 3544024242432. Its totient is φ = 2658018181812.

The previous prime is 3101021212111. The next prime is 3101021212127. The reversal of 3101021212121 is 1212121201013.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3101021212121 - 2¹⁸ = 3101020949977 is a prime.

It is a Duffinian number.

3101021212121 is a modest number, since divided by 21212121 gives 31010 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 3101021212121.

It is not an unprimeable number, because it can be changed into a prime (3101021212127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221501515145 + ... + 221501515158.

It is an arithmetic number, because the mean of its divisors is an integer number (886006060608).

Almost surely, 2^{3101021212121} is an apocalyptic number.

It is an amenable number.

3101021212121 is a deficient number, since it is larger than the sum of its proper divisors (443003030311).

3101021212121 is an equidigital number, since it uses as much as digits as its factorization.

3101021212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443003030310.

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

Adding to 3101021212121 its reverse (1212121201013), we get a palindrome (4313142413134).

The spelling of 3101021212121 in words is "three trillion, one hundred one billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".