221210210121022 has 4 divisors (see below), whose sum is σ = 331815315181536. Its totient is φ = 110605105060510.

The previous prime is 221210210120987. The next prime is 221210210121023. The reversal of 221210210121022 is 220121012012122.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210210121023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55302552530254 + ... + 55302552530257.

It is an arithmetic number, because the mean of its divisors is an integer number (82953828795384).

Almost surely, 2^{221210210121022} is an apocalyptic number.

221210210121022 is a deficient number, since it is larger than the sum of its proper divisors (110605105060514).

221210210121022 is a wasteful number, since it uses less digits than its factorization.

221210210121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110605105060513.

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

Adding to 221210210121022 its reverse (220121012012122), we get a palindrome (441331222133144).

The spelling of 221210210121022 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred ten million, one hundred twenty-one thousand, twenty-two".