21121022100162 has 32 divisors (see below), whose sum is σ = 42778493288640. Its totient is φ = 6951161479680.

The previous prime is 21121022100127. The next prime is 21121022100163. The reversal of 21121022100162 is 26100122012112.

It is not an unprimeable number, because it can be changed into a prime (21121022100163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28250743 + ... + 28988730.

It is an arithmetic number, because the mean of its divisors is an integer number (1336827915270).

Almost surely, 2^{21121022100162} is an apocalyptic number.

21121022100162 is an abundant number, since it is smaller than the sum of its proper divisors (21657471188478).

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

21121022100162 is a wasteful number, since it uses less digits than its factorization.

21121022100162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57240258.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 21121022100162 its reverse (26100122012112), we get a palindrome (47221144112274).

The spelling of 21121022100162 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, one hundred thousand, one hundred sixty-two".