21111122221202 has 32 divisors (see below), whose sum is σ = 34678163741760. Its totient is φ = 9580507709760.

The previous prime is 21111122221201. The next prime is 21111122221223. The reversal of 21111122221202 is 20212222111112.

It is not an unprimeable number, because it can be changed into a prime (21111122221201) 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, 28060928 + ... + 28803435.

It is an arithmetic number, because the mean of its divisors is an integer number (1083692616930).

Almost surely, 2^{21111122221202} is an apocalyptic number.

21111122221202 is a deficient number, since it is larger than the sum of its proper divisors (13567041520558).

21111122221202 is a wasteful number, since it uses less digits than its factorization.

21111122221202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56864618.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21111122221202 its reverse (20212222111112), we get a palindrome (41323344332314).

The spelling of 21111122221202 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred two".