1000201212021 has 16 divisors (see below), whose sum is σ = 1540416840768. Its totient is φ = 570524755200.

The previous prime is 1000201212019. The next prime is 1000201212071. The reversal of 1000201212021 is 1202121020001.

It is not a de Polignac number, because 1000201212021 - 2¹ = 1000201212019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000201211988 and 1000201212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000201212001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 891444370 + ... + 891445491.

It is an arithmetic number, because the mean of its divisors is an integer number (96276052548).

Almost surely, 2^{1000201212021} is an apocalyptic number.

1000201212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000201212021 is a deficient number, since it is larger than the sum of its proper divisors (540215628747).

1000201212021 is a wasteful number, since it uses less digits than its factorization.

1000201212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782889892.

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

Adding to 1000201212021 its reverse (1202121020001), we get a palindrome (2202322232022).

The spelling of 1000201212021 in words is "one trillion, two hundred one million, two hundred twelve thousand, twenty-one".