21012021012202 has 16 divisors (see below), whose sum is σ = 34723735897824. Its totient is φ = 9456355090000.

The previous prime is 21012021012179. The next prime is 21012021012209. The reversal of 21012021012202 is 20221012021012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21012021012209) 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, 4728175324 + ... + 4728179767.

It is an arithmetic number, because the mean of its divisors is an integer number (2170233493614).

Almost surely, 2^{21012021012202} is an apocalyptic number.

21012021012202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21012021012202 is a deficient number, since it is larger than the sum of its proper divisors (13711714885622).

21012021012202 is a wasteful number, since it uses less digits than its factorization.

21012021012202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456355205.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21012021012202 its reverse (20221012021012), we get a palindrome (41233033033214).

It can be divided in two parts, 21012021012 and 202, that multiplied together give a palindrome (4244428244424).

The spelling of 21012021012202 in words is "twenty-one trillion, twelve billion, twenty-one million, twelve thousand, two hundred two".