21221021101122 has 16 divisors (see below), whose sum is σ = 47157824669280. Its totient is φ = 7073673700356.

The previous prime is 21221021101067. The next prime is 21221021101141. The reversal of 21221021101122 is 22110112012212.

21221021101122 is a `hidden beast` number, since 212 + 210 + 21 + 101 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21221021101095 and 21221021101104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196490936068 + ... + 196490936175.

It is an arithmetic number, because the mean of its divisors is an integer number (2947364041830).

Almost surely, 2^{21221021101122} is an apocalyptic number.

21221021101122 is an abundant number, since it is smaller than the sum of its proper divisors (25936803568158).

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

21221021101122 is a wasteful number, since it uses less digits than its factorization.

21221021101122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392981872254 (or 392981872248 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21221021101122 its reverse (22110112012212), we get a palindrome (43331133113334).

The spelling of 21221021101122 in words is "twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred one thousand, one hundred twenty-two".