2101220010021 has 8 divisors (see below), whose sum is σ = 3056320014624. Its totient is φ = 1273466672720.

The previous prime is 2101220010013. The next prime is 2101220010061. The reversal of 2101220010021 is 1200100221012.

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

It is not a de Polignac number, because 2101220010021 - 2³ = 2101220010013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101220009979 and 2101220010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101220010011) 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, 31836666786 + ... + 31836666851.

It is an arithmetic number, because the mean of its divisors is an integer number (382040001828).

Almost surely, 2^{2101220010021} is an apocalyptic number.

It is an amenable number.

2101220010021 is a deficient number, since it is larger than the sum of its proper divisors (955100004603).

2101220010021 is a wasteful number, since it uses less digits than its factorization.

2101220010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63673333651.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2101220010021 its reverse (1200100221012), we get a palindrome (3301320231033).

The spelling of 2101220010021 in words is "two trillion, one hundred one billion, two hundred twenty million, ten thousand, twenty-one".