1001201021121 has 32 divisors (see below), whose sum is σ = 1630203252480. Its totient is φ = 533521022976.

The previous prime is 1001201021063. The next prime is 1001201021129. The reversal of 1001201021121 is 1211201021001.

It is not a de Polignac number, because 1001201021121 - 2⁷ = 1001201020993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1001201021097 and 1001201021106.

It is not an unprimeable number, because it can be changed into a prime (1001201021129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12825696 + ... + 12903521.

It is an arithmetic number, because the mean of its divisors is an integer number (50943851640).

Almost surely, 2^{1001201021121} is an apocalyptic number.

It is an amenable number.

1001201021121 is a deficient number, since it is larger than the sum of its proper divisors (629002231359).

1001201021121 is a wasteful number, since it uses less digits than its factorization.

1001201021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25729353.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1001201021121 its reverse (1211201021001), we get a palindrome (2212402042122).

The spelling of 1001201021121 in words is "one trillion, one billion, two hundred one million, twenty-one thousand, one hundred twenty-one".