101220132121 has 4 divisors (see below), whose sum is σ = 101388552244. Its totient is φ = 101051712000.

The previous prime is 101220132109. The next prime is 101220132131. The reversal of 101220132121 is 121231022101.

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 78995285721 + 22224846400 = 281061^2 + 149080^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220132121 - 2¹⁵ = 101220099353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101220132095 and 101220132104.

It is not an unprimeable number, because it can be changed into a prime (101220132131) 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, 84209160 + ... + 84210361.

It is an arithmetic number, because the mean of its divisors is an integer number (25347138061).

Almost surely, 2^101220132121 is an apocalyptic number.

It is an amenable number.

101220132121 is a deficient number, since it is larger than the sum of its proper divisors (168420123).

101220132121 is an equidigital number, since it uses as much as digits as its factorization.

101220132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168420122.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 101220132121 its reverse (121231022101), we get a palindrome (222451154222).

The spelling of 101220132121 in words is "one hundred one billion, two hundred twenty million, one hundred thirty-two thousand, one hundred twenty-one".