21020000201213 has 16 divisors (see below), whose sum is σ = 23127233106096. Its totient is φ = 18986107760640.

The previous prime is 21020000201203. The next prime is 21020000201227. The reversal of 21020000201213 is 31210200002012.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 12371448532249 + 8648551668964 = 3517307^2 + 2940842^2 .

It is a cyclic number.

It is not a de Polignac number, because 21020000201213 - 2¹⁶ = 21020000135677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020000201203) 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, 68517770 + ... + 68823867.

It is an arithmetic number, because the mean of its divisors is an integer number (1445452069131).

Almost surely, 2^{21020000201213} is an apocalyptic number.

It is an amenable number.

21020000201213 is a deficient number, since it is larger than the sum of its proper divisors (2107232904883).

21020000201213 is a wasteful number, since it uses less digits than its factorization.

21020000201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137341904.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21020000201213 its reverse (31210200002012), we get a palindrome (52230200203225).

The spelling of 21020000201213 in words is "twenty-one trillion, twenty billion, two hundred one thousand, two hundred thirteen".