201021212019 has 16 divisors (see below), whose sum is σ = 269061004800. Its totient is φ = 133497915936.

The previous prime is 201021211997. The next prime is 201021212023. The reversal of 201021212019 is 910212120102.

It is not a de Polignac number, because 201021212019 - 2¹² = 201021207923 is a prime.

It is a super-2 number, since 2×201021212019² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201021211986 and 201021212004.

It is not an unprimeable number, because it can be changed into a prime (201021212419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8868102 + ... + 8890740.

It is an arithmetic number, because the mean of its divisors is an integer number (16816312800).

Almost surely, 2^201021212019 is an apocalyptic number.

201021212019 is a deficient number, since it is larger than the sum of its proper divisors (68039792781).

201021212019 is a wasteful number, since it uses less digits than its factorization.

201021212019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33914.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 201021212019 in words is "two hundred one billion, twenty-one million, two hundred twelve thousand, nineteen".