221020110101012 has 6 divisors (see below), whose sum is σ = 386785192676778. Its totient is φ = 110510055050504.

The previous prime is 221020110100931. The next prime is 221020110101033. The reversal of 221020110101012 is 210101011020122.

It can be written as a sum of positive squares in only one way, i.e., 134669851210756 + 86350258890256 = 11604734^2 + 9292484^2 .

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, 27627513762623 + ... + 27627513762630.

It is an arithmetic number, because the mean of its divisors is an integer number (64464198779463).

Almost surely, 2^{221020110101012} is an apocalyptic number.

It is an amenable number.

221020110101012 is a deficient number, since it is larger than the sum of its proper divisors (165765082575766).

221020110101012 is a wasteful number, since it uses less digits than its factorization.

221020110101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55255027525257 (or 55255027525255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221020110101012 its reverse (210101011020122), we get a palindrome (431121121121134).

It can be divided in two parts, 221020110 and 101012, that added together give a palindrome (221121122).

The spelling of 221020110101012 in words is "two hundred twenty-one trillion, twenty billion, one hundred ten million, one hundred one thousand, twelve".