20001220210102 has 16 divisors (see below), whose sum is σ = 30021206648400. Its totient is φ = 9994153276800.

The previous prime is 20001220210019. The next prime is 20001220210123. The reversal of 20001220210102 is 20101202210002.

It is a happy number.

It is a congruent number.

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, 20176474 + ... + 21144562.

It is an arithmetic number, because the mean of its divisors is an integer number (1876325415525).

Almost surely, 2^{20001220210102} is an apocalyptic number.

20001220210102 is a deficient number, since it is larger than the sum of its proper divisors (10019986438298).

20001220210102 is a wasteful number, since it uses less digits than its factorization.

20001220210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974751.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20001220210102 its reverse (20101202210002), we get a palindrome (40102422420104).

The spelling of 20001220210102 in words is "twenty trillion, one billion, two hundred twenty million, two hundred ten thousand, one hundred two".