101031220121 has 8 divisors (see below), whose sum is σ = 109254319944. Its totient is φ = 92872615680.

The previous prime is 101031220111. The next prime is 101031220237. The reversal of 101031220121 is 121022130101.

It can be written as a sum of positive squares in 4 ways, for example, as 62980096 + 100968240025 = 7936^2 + 317755^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101031220121 - 2²² = 101027025817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101031220096 and 101031220105.

It is not an unprimeable number, because it can be changed into a prime (101031220111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16120586 + ... + 16126851.

It is an arithmetic number, because the mean of its divisors is an integer number (13656789993).

Almost surely, 2^101031220121 is an apocalyptic number.

It is an amenable number.

101031220121 is a deficient number, since it is larger than the sum of its proper divisors (8223099823).

101031220121 is a wasteful number, since it uses less digits than its factorization.

101031220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32247691.

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

Adding to 101031220121 its reverse (121022130101), we get a palindrome (222053350222).

The spelling of 101031220121 in words is "one hundred one billion, thirty-one million, two hundred twenty thousand, one hundred twenty-one".