221021000110102 has 4 divisors (see below), whose sum is σ = 331531500165156. Its totient is φ = 110510500055050.

The previous prime is 221021000110019. The next prime is 221021000110117. The reversal of 221021000110102 is 201011000120122.

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

It is a super-2 number, since 2×221021000110102² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255250027524 + ... + 55255250027527.

It is an arithmetic number, because the mean of its divisors is an integer number (82882875041289).

Almost surely, 2^{221021000110102} is an apocalyptic number.

221021000110102 is a deficient number, since it is larger than the sum of its proper divisors (110510500055054).

221021000110102 is a wasteful number, since it uses less digits than its factorization.

221021000110102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510500055053.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221021000110102 its reverse (201011000120122), we get a palindrome (422032000230224).

The spelling of 221021000110102 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred ten thousand, one hundred two".