2101212103121 has 4 divisors (see below), whose sum is σ = 2150077500912. Its totient is φ = 2052346705332.

The previous prime is 2101212103061. The next prime is 2101212103147. The reversal of 2101212103121 is 1213012121012.

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 a cyclic number.

It is not a de Polignac number, because 2101212103121 - 2¹⁴ = 2101212086737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101212103121.

It is not an unprimeable number, because it can be changed into a prime (2101212163121) 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, 24432698831 + ... + 24432698916.

It is an arithmetic number, because the mean of its divisors is an integer number (537519375228).

Almost surely, 2^{2101212103121} is an apocalyptic number.

It is an amenable number.

2101212103121 is a deficient number, since it is larger than the sum of its proper divisors (48865397791).

2101212103121 is an equidigital number, since it uses as much as digits as its factorization.

2101212103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48865397790.

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

Adding to 2101212103121 its reverse (1213012121012), we get a palindrome (3314224224133).

The spelling of 2101212103121 in words is "two trillion, one hundred one billion, two hundred twelve million, one hundred three thousand, one hundred twenty-one".