1000201220121 has 32 divisors (see below), whose sum is σ = 1369898788608. Its totient is φ = 648953441280.

The previous prime is 1000201220119. The next prime is 1000201220129. The reversal of 1000201220121 is 1210221020001.

It is not a de Polignac number, because 1000201220121 - 2¹ = 1000201220119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000201220097 and 1000201220106.

It is not an unprimeable number, because it can be changed into a prime (1000201220129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4910691 + ... + 5110311.

It is an arithmetic number, because the mean of its divisors is an integer number (42809337144).

Almost surely, 2^{1000201220121} is an apocalyptic number.

It is an amenable number.

1000201220121 is a deficient number, since it is larger than the sum of its proper divisors (369697568487).

1000201220121 is a wasteful number, since it uses less digits than its factorization.

1000201220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200001.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1000201220121 its reverse (1210221020001), we get a palindrome (2210422240122).

The spelling of 1000201220121 in words is "one trillion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".