221011122021102 has 96 divisors (see below), whose sum is σ = 555118846124544. Its totient is φ = 62245403640000.

The previous prime is 221011122021097. The next prime is 221011122021121. The reversal of 221011122021102 is 201120221110122.

221011122021102 is a `hidden beast` number, since 2 + 210 + 111 + 220 + 21 + 102 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35364274 + ... + 41141877.

It is an arithmetic number, because the mean of its divisors is an integer number (5782487980464).

Almost surely, 2^{221011122021102} is an apocalyptic number.

221011122021102 is an abundant number, since it is smaller than the sum of its proper divisors (334107724103442).

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

221011122021102 is a wasteful number, since it uses less digits than its factorization.

221011122021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76506494 (or 76506491 counting only the distinct ones).

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

Adding to 221011122021102 its reverse (201120221110122), we get a palindrome (422131343131224).

The spelling of 221011122021102 in words is "two hundred twenty-one trillion, eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred two".