20010021213 has 32 divisors (see below), whose sum is σ = 33076705536. Its totient is φ = 10477675008.

The previous prime is 20010021203. The next prime is 20010021217. The reversal of 20010021213 is 31212001002.

It is not a de Polignac number, because 20010021213 - 2⁴ = 20010021197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010021217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 230106 + ... + 304907.

It is an arithmetic number, because the mean of its divisors is an integer number (1033647048).

Almost surely, 2^20010021213 is an apocalyptic number.

It is an amenable number.

20010021213 is a deficient number, since it is larger than the sum of its proper divisors (13066684323).

20010021213 is a wasteful number, since it uses less digits than its factorization.

20010021213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535173.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20010021213 its reverse (31212001002), we get a palindrome (51222022215).

The spelling of 20010021213 in words is "twenty billion, ten million, twenty-one thousand, two hundred thirteen".