2121002220102 has 32 divisors (see below), whose sum is σ = 4289817590784. Its totient is φ = 699070850400.

The previous prime is 2121002220101. The next prime is 2121002220107. The reversal of 2121002220102 is 2010222001212.

It is a super-2 number, since 2×2121002220102² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121002220101) 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, 4653174 + ... + 5088617.

It is an arithmetic number, because the mean of its divisors is an integer number (134056799712).

Almost surely, 2^{2121002220102} is an apocalyptic number.

2121002220102 is an abundant number, since it is smaller than the sum of its proper divisors (2168815370682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121002220102 is a wasteful number, since it uses less digits than its factorization.

2121002220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9742204.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2121002220102 its reverse (2010222001212), we get a palindrome (4131224221314).

The spelling of 2121002220102 in words is "two trillion, one hundred twenty-one billion, two million, two hundred twenty thousand, one hundred two".