2001021021112 has 32 divisors (see below), whose sum is σ = 4041229737600. Its totient is φ = 925808988384.

The previous prime is 2001021021091. The next prime is 2001021021133. The reversal of 2001021021112 is 2111201201002.

It is an interprime number because it is at equal distance from previous prime (2001021021091) and next prime (2001021021133).

It is a super-2 number, since 2×2001021021112² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001021021092 and 2001021021101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153070348 + ... + 153083419.

It is an arithmetic number, because the mean of its divisors is an integer number (126288429300).

Almost surely, 2^{2001021021112} is an apocalyptic number.

It is an amenable number.

2001021021112 is an abundant number, since it is smaller than the sum of its proper divisors (2040208716488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001021021112 is a wasteful number, since it uses less digits than its factorization.

2001021021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306153835 (or 306153831 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001021021112 its reverse (2111201201002), we get a palindrome (4112222222114).

The spelling of 2001021021112 in words is "two trillion, one billion, twenty-one million, twenty-one thousand, one hundred twelve".