1001211110021 has 8 divisors (see below), whose sum is σ = 1066970582784. Its totient is φ = 937304016880.

The previous prime is 1001211109961. The next prime is 1001211110051. The reversal of 1001211110021 is 1200111121001.

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

It is not a de Polignac number, because 1001211110021 - 2²⁶ = 1001144001157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001211109984 and 1001211110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001211110051) 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, 463093790 + ... + 463095951.

It is an arithmetic number, because the mean of its divisors is an integer number (133371322848).

Almost surely, 2^{1001211110021} is an apocalyptic number.

It is an amenable number.

1001211110021 is a deficient number, since it is larger than the sum of its proper divisors (65759472763).

1001211110021 is an equidigital number, since it uses as much as digits as its factorization.

1001211110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926189811.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1001211110021 its reverse (1200111121001), we get a palindrome (2201322231022).

The spelling of 1001211110021 in words is "one trillion, one billion, two hundred eleven million, one hundred ten thousand, twenty-one".