2001002121011 has 8 divisors (see below), whose sum is σ = 2066538173760. Its totient is φ = 1936422799168.

The previous prime is 2001002120993. The next prime is 2001002121029. The reversal of 2001002121011 is 1101212001002.

It is an interprime number because it is at equal distance from previous prime (2001002120993) and next prime (2001002121029).

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

It is a cyclic number.

It is not a de Polignac number, because 2001002121011 - 2¹⁴ = 2001002104627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001002120983 and 2001002121001.

It is not an unprimeable number, because it can be changed into a prime (2001002121061) 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, 239178476 + ... + 239186841.

It is an arithmetic number, because the mean of its divisors is an integer number (258317271720).

Almost surely, 2^{2001002121011} is an apocalyptic number.

2001002121011 is a deficient number, since it is larger than the sum of its proper divisors (65536052749).

2001002121011 is an equidigital number, since it uses as much as digits as its factorization.

2001002121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478365453.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2001002121011 its reverse (1101212001002), we get a palindrome (3102214122013).

The spelling of 2001002121011 in words is "two trillion, one billion, two million, one hundred twenty-one thousand, eleven".