101220111221210 has 32 divisors (see below), whose sum is σ = 182610697412880. Its totient is φ = 40396003610112.

The previous prime is 101220111221209. The next prime is 101220111221227. The reversal of 101220111221210 is 12122111022101.

It can be written as a sum of positive squares in 8 ways, for example, as 18499831106449 + 82720280114761 = 4301143^2 + 9095069^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7286192 + ... + 15985268.

Almost surely, 2^{101220111221210} is an apocalyptic number.

101220111221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101220111221210 is a deficient number, since it is larger than the sum of its proper divisors (81390586191670).

101220111221210 is a wasteful number, since it uses less digits than its factorization.

101220111221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701730.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 101220111221210 its reverse (12122111022101), we get a palindrome (113342222243311).

The spelling of 101220111221210 in words is "one hundred one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, two hundred ten".