20010122213 has 4 divisors (see below), whose sum is σ = 21063286560. Its totient is φ = 18956957868.

The previous prime is 20010122189. The next prime is 20010122261. The reversal of 20010122213 is 31222101002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20010122213 - 2³⁰ = 18936380389 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 (20010122813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526582145 + ... + 526582182.

It is an arithmetic number, because the mean of its divisors is an integer number (5265821640).

Almost surely, 2^20010122213 is an apocalyptic number.

It is an amenable number.

20010122213 is a deficient number, since it is larger than the sum of its proper divisors (1053164347).

20010122213 is a wasteful number, since it uses less digits than its factorization.

20010122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053164346.

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

Adding to 20010122213 its reverse (31222101002), we get a palindrome (51232223215).

The spelling of 20010122213 in words is "twenty billion, ten million, one hundred twenty-two thousand, two hundred thirteen".