213020001 has 24 divisors (see below), whose sum is σ = 328741920. Its totient is φ = 132523776.

The previous prime is 213019999. The next prime is 213020053. The reversal of 213020001 is 100020312.

It is a happy number.

213020001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213020001 - 2¹ = 213019999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (213020701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2161 + ... + 20753.

It is an arithmetic number, because the mean of its divisors is an integer number (13697580).

Almost surely, 2^213020001 is an apocalyptic number.

It is an amenable number.

213020001 is a deficient number, since it is larger than the sum of its proper divisors (115721919).

213020001 is a wasteful number, since it uses less digits than its factorization.

213020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18685 (or 18682 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 213020001 is about 14595.2047262106. The cubic root of 213020001 is about 597.2279543279.

Adding to 213020001 its reverse (100020312), we get a palindrome (313040313).

The spelling of 213020001 in words is "two hundred thirteen million, twenty thousand, one".