2002102101221 has 16 divisors (see below), whose sum is σ = 2060990400000. Its totient is φ = 1944187960176.

The previous prime is 2002102101211. The next prime is 2002102101299. The reversal of 2002102101221 is 1221012012002.

It is a cyclic number.

It is not a de Polignac number, because 2002102101221 - 2¹⁴ = 2002102084837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002102101196 and 2002102101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002102101211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1018610 + ... + 2245388.

It is an arithmetic number, because the mean of its divisors is an integer number (128811900000).

Almost surely, 2^{2002102101221} is an apocalyptic number.

It is an amenable number.

2002102101221 is a deficient number, since it is larger than the sum of its proper divisors (58888298779).

2002102101221 is a wasteful number, since it uses less digits than its factorization.

2002102101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227176.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2002102101221 its reverse (1221012012002), we get a palindrome (3223114113223).

The spelling of 2002102101221 in words is "two trillion, two billion, one hundred two million, one hundred one thousand, two hundred twenty-one".