212001220101021 has 64 divisors (see below), whose sum is σ = 313110622315008. Its totient is φ = 126744992621568.

The previous prime is 212001220101007. The next prime is 212001220101029. The reversal of 212001220101021 is 120101022100212.

It is not a de Polignac number, because 212001220101021 - 2¹¹ = 212001220098973 is a prime.

It is a super-3 number, since 3×212001220101021³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001220101029) 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, 12858681640 + ... + 12858698126.

It is an arithmetic number, because the mean of its divisors is an integer number (4892353473672).

Almost surely, 2^{212001220101021} is an apocalyptic number.

It is an amenable number.

212001220101021 is a deficient number, since it is larger than the sum of its proper divisors (101109402213987).

212001220101021 is a wasteful number, since it uses less digits than its factorization.

212001220101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29430.

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

Adding to 212001220101021 its reverse (120101022100212), we get a palindrome (332102242201233).

It can be divided in two parts, 212001 and 220101021, that added together give a palindrome (220313022).

The spelling of 212001220101021 in words is "two hundred twelve trillion, one billion, two hundred twenty million, one hundred one thousand, twenty-one".