101220211011121 has 4 divisors (see below), whose sum is σ = 101596494323700. Its totient is φ = 100843927698544.

The previous prime is 101220211011113. The next prime is 101220211011131. The reversal of 101220211011121 is 121110112022101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6923681801521 + 94296529209600 = 2631289^2 + 9710640^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220211011121 - 2³ = 101220211011113 is a prime.

It is a super-2 number, since 2×101220211011121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101220211011095 and 101220211011104.

It is not an unprimeable number, because it can be changed into a prime (101220211011131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188141655886 + ... + 188141656423.

It is an arithmetic number, because the mean of its divisors is an integer number (25399123580925).

Almost surely, 2^{101220211011121} is an apocalyptic number.

It is an amenable number.

101220211011121 is a deficient number, since it is larger than the sum of its proper divisors (376283312579).

101220211011121 is an equidigital number, since it uses as much as digits as its factorization.

101220211011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376283312578.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 101220211011121 its reverse (121110112022101), we get a palindrome (222330323033222).

The spelling of 101220211011121 in words is "one hundred one trillion, two hundred twenty billion, two hundred eleven million, eleven thousand, one hundred twenty-one".