21102211212202 has 16 divisors (see below), whose sum is σ = 31715523216000. Its totient is φ = 10530385601472.

The previous prime is 21102211212191. The next prime is 21102211212209. The reversal of 21102211212202 is 20221211220112.

It is a self number, because there is not a number n which added to its sum of digits gives 21102211212202.

It is not an unprimeable number, because it can be changed into a prime (21102211212209) 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, 1133343 + ... + 6594610.

It is an arithmetic number, because the mean of its divisors is an integer number (1982220201000).

Almost surely, 2^{21102211212202} is an apocalyptic number.

21102211212202 is a deficient number, since it is larger than the sum of its proper divisors (10613312003798).

21102211212202 is a wasteful number, since it uses less digits than its factorization.

21102211212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7730637.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21102211212202 its reverse (20221211220112), we get a palindrome (41323422432314).

The spelling of 21102211212202 in words is "twenty-one trillion, one hundred two billion, two hundred eleven million, two hundred twelve thousand, two hundred two".