221012100202101 has 64 divisors (see below), whose sum is σ = 330285247057920. Its totient is φ = 130585988816640.

The previous prime is 221012100202097. The next prime is 221012100202111. The reversal of 221012100202101 is 101202001210122.

221012100202101 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221012100202101 - 2² = 221012100202097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012100202111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39769446 + ... + 44984808.

It is an arithmetic number, because the mean of its divisors is an integer number (5160706985280).

Almost surely, 2^{221012100202101} is an apocalyptic number.

It is an amenable number.

221012100202101 is a deficient number, since it is larger than the sum of its proper divisors (109273146855819).

221012100202101 is a wasteful number, since it uses less digits than its factorization.

221012100202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215866.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221012100202101 its reverse (101202001210122), we get a palindrome (322214101412223).

The spelling of 221012100202101 in words is "two hundred twenty-one trillion, twelve billion, one hundred million, two hundred two thousand, one hundred one".