212001021001 has 12 divisors (see below), whose sum is σ = 269032836240. Its totient is φ = 165195600360.

The previous prime is 212001020977. The next prime is 212001021007. The reversal of 212001021001 is 100120100212.

It is not a de Polignac number, because 212001021001 - 2²¹ = 211998923849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212001021007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196660891 + ... + 196661968.

It is an arithmetic number, because the mean of its divisors is an integer number (22419403020).

Almost surely, 2^212001021001 is an apocalyptic number.

It is an amenable number.

212001021001 is a deficient number, since it is larger than the sum of its proper divisors (57031815239).

212001021001 is a wasteful number, since it uses less digits than its factorization.

212001021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393322884 (or 393322877 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 212001021001 its reverse (100120100212), we get a palindrome (312121121213).

The spelling of 212001021001 in words is "two hundred twelve billion, one million, twenty-one thousand, one".