101203210121 has 4 divisors (see below), whose sum is σ = 108988072452. Its totient is φ = 93418347792.

The previous prime is 101203210103. The next prime is 101203210123. The reversal of 101203210121 is 121012302101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121012302101 = 2741 ⋅44148961.

It can be written as a sum of positive squares in 2 ways, for example, as 16399363600 + 84803846521 = 128060^2 + 291211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101203210121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101203210096 and 101203210105.

It is not an unprimeable number, because it can be changed into a prime (101203210123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3892431146 + ... + 3892431171.

It is an arithmetic number, because the mean of its divisors is an integer number (27247018113).

Almost surely, 2^101203210121 is an apocalyptic number.

It is an amenable number.

101203210121 is a deficient number, since it is larger than the sum of its proper divisors (7784862331).

101203210121 is an equidigital number, since it uses as much as digits as its factorization.

101203210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7784862330.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 101203210121 its reverse (121012302101), we get a palindrome (222215512222).

The spelling of 101203210121 in words is "one hundred one billion, two hundred three million, two hundred ten thousand, one hundred twenty-one".