2101311001021 has 8 divisors (see below), whose sum is σ = 2103203309760. Its totient is φ = 2099419544352.

The previous prime is 2101311001003. The next prime is 2101311001037. The reversal of 2101311001021 is 1201001131012.

It is a happy number.

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 2101311001021 - 2²⁹ = 2100774130109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101311000992 and 2101311001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101311001051) 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, 4773840 + ... + 5195398.

It is an arithmetic number, because the mean of its divisors is an integer number (262900413720).

Almost surely, 2^{2101311001021} is an apocalyptic number.

It is an amenable number.

2101311001021 is a deficient number, since it is larger than the sum of its proper divisors (1892308739).

2101311001021 is a wasteful number, since it uses less digits than its factorization.

2101311001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426035.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 2101311001021 its reverse (1201001131012), we get a palindrome (3302312132033).

The spelling of 2101311001021 in words is "two trillion, one hundred one billion, three hundred eleven million, one thousand, twenty-one".