212021001231 has 16 divisors (see below), whose sum is σ = 304452040704. Its totient is φ = 130469478624.

The previous prime is 212021001161. The next prime is 212021001263. The reversal of 212021001231 is 132100120212.

It is not a de Polignac number, because 212021001231 - 2¹⁰ = 212021000207 is a prime.

It is a super-2 number, since 2×212021001231² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212021001231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021001271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1109890 + ... + 1286816.

It is an arithmetic number, because the mean of its divisors is an integer number (19028252544).

Almost surely, 2^212021001231 is an apocalyptic number.

212021001231 is a deficient number, since it is larger than the sum of its proper divisors (92431039473).

212021001231 is a wasteful number, since it uses less digits than its factorization.

212021001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207670.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212021001231 its reverse (132100120212), we get a palindrome (344121121443).

The spelling of 212021001231 in words is "two hundred twelve billion, twenty-one million, one thousand, two hundred thirty-one".