2101011210021 has 8 divisors (see below), whose sum is σ = 2801355580000. Its totient is φ = 1400670490032.

The previous prime is 2101011210007. The next prime is 2101011210029. The reversal of 2101011210021 is 1200121101012.

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

It is not a de Polignac number, because 2101011210021 - 2¹¹ = 2101011207973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101011209979 and 2101011210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101011210029) 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, 1008126 + ... + 2284368.

It is an arithmetic number, because the mean of its divisors is an integer number (350169447500).

Almost surely, 2^{2101011210021} is an apocalyptic number.

It is an amenable number.

2101011210021 is a deficient number, since it is larger than the sum of its proper divisors (700344369979).

2101011210021 is a wasteful number, since it uses less digits than its factorization.

2101011210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824995.

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

Adding to 2101011210021 its reverse (1200121101012), we get a palindrome (3301132311033).

The spelling of 2101011210021 in words is "two trillion, one hundred one billion, eleven million, two hundred ten thousand, twenty-one".